2010
Nielsen, L.R., E. Jørgensen, A. R. Kristensen & S. Østergaard.
2009. Optimal replacement policies for dairy cows based on daily yield
measurements. Journal of Dairy Science 93, 75-92.
2009
Ettema, J.F., S. Østergaard & A.R. Kristensen. 2009.
Estimation of
probability for the presence of claw and digital skin diseases by combining cow-
and herd-level information using a Bayesian network. Preventive
Veterinary Medicine 92, 89-98.
Jensen, T. B., A.R. Kristensen, N. Toft, N.P. Baadsgaard, S. Østergaard & H.
Houe. 2009. An
object-oriented Bayesian network modeling the causes of leg
disorders in finisher herds. Preventive Veterinary Medicine 89,
237-248.
2008
Cornou, C., J. Vinther & A.R. Kristensen. 2008.
Automatic detection of oestrus and health disorders using data from Electronic Sow Feeders.
Livestock Sciencre 118, 262-271.
2007
Jensen, T.B., A.R. Kristensen & N. Toft. 2007.
Modeling the causes of leg disorders in finisher herds. XIII
International congress in animal hygiene : ISAH - 2007, Estonia. p417-422.
Nielsen, B.K. & A.R. Kristensen. 2007. Optimal decisions in organic beef
production from steers – effects of criterion of optimality and price changes.
Livestock Science 110, 25-32.
Ge, L., R.B.M. Huirne, M.C.M. Mourits, Ó. Gutiérrez & A.R. Kristensen.
2007. Discovering real options in the optimal
control of foot-and-mouth disease. International workshop held at Research
Centre Foulum 9-10 November 2006.
DJF Animal
Science 77, 51-55.
Nielsen, B., S.M. Thamsborg & A.R. Kristensen. 2007. Skru ned for
studenes tilvækst om vinteren. Økologisk Jordbrug 378, 11.
Nielsen, B., S.M. Thamsborg & A.R. Kristensen. 2007. Slutfedning betaler sig
ikke. Økologisk Jordbrug 378, 11.
2006
Kristensen, A.R., E. Jørgensen & N. Toft. 2006.
Herd Management Science.
Preliminary Edition compiled for the Advanced Herd Management course, KVL,
August 28th - November 3rd, 2006, The Royal Veterinary and Agricultural
University. 340 pp.
Nielsen, L.R. & A.R. Kristensen. 2006.
Finding the K best policies in a
finite-horizon Markov decision process. European Journal of Operational
Research 175, 1164-1179.
Kristensen, A.R. 2006. Muligheder med IT. Kongres for
svineproducenter 2006, 99-100. Dansk Svineproduktion.
Houe H, N.P. Baadsgaard, H.D. Emborg, C. Enevoldsen, A.K. Ersbøll, B.
Forkman, M. Greiner, T.B. Jensen, A.R. Kristensen, T. Mark, L.R. Nielsen, S.S.
Nielsen, P.
Sandøe, H. Stege, P.T. Thomsen, N. Toft N & G. Tveit. 2006.
Guidelines for database protocols on disease and welfare recording.
Proceedings of the 11th Symposium of the International Society for Veterinary
Epidemiology and Economics, Cairns, Australia: ISVEE 11, 891, 2006
Hansen, M.S. & A.R. Kristensen. 2006.
LIMIDs for decision support in pig
production. EURO XXI. 21st European Conference on
Operational Research, Reykjavik,
Iceland, July 2-5.
Abstract: Journal of Agricultural Science 144, 468.
Ge, L., A. Kristensen, M. Mourits & R. Huirne. 2006. The ‘curse of
animal disease’ and the ‘curse of dimensionality’ : A new decision support
framework for the control of foot-and-mouth disease epidemics. EURO XXI. 21st European Conference on
Operational Research, Reykjavik,
Iceland, July 2-5.
Abstract: Journal of Agricultural Science 144, 468.
2005
Heiskanen, T., A.R. Kristensen, C. Cornou & P. Bonnet, 2005.
Trådløs overvågning - fremtidens værktøj i løsdriftsstalden. Hyologisk,
June 2005, 31-33.
Madsen, T.N. & A.R. Kristensen. 2005.
A model for monitoring the condition of
young pigs by their drinking behavior. Computers and Electronics in
Agriculture 48, 138-154.
Madsen, T.N., S. Andersen & A.R. Kristensen. 2005.
Modelling the drinking
pattern of young pigs using a state space model. Computers and Electronics in
Agriculture 48, 39-62.
Toft, N., A.R. Kristensen & E. Jørgensen. 2005.
A framework for decision
support related to infectious diseases in slaughter pig fattening units.
Agricultural Systems 85, 120-137.
Nielsen, L.R. & A.R. Kristensen. 2005. Risk
management in forestry - Possible solution approaches. Dina Notat No.
111.
2004
Nielsen, L.R & A.R. Kristensen. 2004. Finding
the K best policies in finite-horizon Markov decision processes.
Dina Research Report 110.
Nielsen, L.R. & A.R. Kristensen. 2004.
Risk aversion in Markov decision processes. EDWA-04 European Workshop for
Decision Problems in Agriculture and Natural Resources, 71-82. Silsoe, England 27th
- 28th September, 2004.
Nielsen, B.K., A.R. Kristensen & S.M. Thamsborg. 2004.
Optimal
decisions in organic steer production – a model including winter feed
level, grazing strategy and slaughtering policy. Livestock
Production Science 88, 239-250.
McAinsh, C.V. & A.R. Kristensen. 2004.
Dynamic modelling of a traditional
African chicken production system. Tropical Animal Health and Production
36, 609-626.
Kristensen, A.R. & T.A. Søllested. 2004.
A sow replacement model using
Bayesian updating in a 3-level hierarchic Markov process. I. Biological model.
Livestock Production Science 87, 13-24.
Kristensen, A.R. & T.A. Søllested. 2004.
A sow replacement
model using Bayesian updating in a three-level hierarchic Markov process II.
Optimization model. Livestock Production Science 87, 25-36.
2003
Lien, G., A.R. Kristensen, A. Hegrenes & J.B. Hardaker. 2003.
Optimal length of
leys in an area with winter damage problems. Grass and Forage Science 58,
168-177.
Kristensen, A.R. & C.V. Pedersen. 2003.
Representation of uncertainty in
a Monte Carlo simulation model of a scanvenging chicken production system.
EFITA 2003. Fourth European Conference of the European Federation for
Information Technology in Agriculture, Food and the Environment,
Debrecen, Hungary, July 5-9.
Kristensen, A.R. 2003. Optimal slaughter pig
marketing with emphasis on information from on-line live weight assessment.
EFITA 2003. Fourth European Conference of the European Federation for
Information Technology in Agriculture, Food and the Environment,
Debrecen, Hungary, July 5-9.
Hegrenes, A., A.R. Kristensen & G. Lien. 2003.
Optimal economic length of leys:
a dynamic programming approach. 25th International Conference of Agricultural
Economists, Durban, South Africa, August 16-22.
Kristensen, A.R. 2003.
A general software system for Markov decision
processes in herd management applications. Computers and Electronics in
Agriculture 38, 199-215.
2002:
Pedersen, C.V., A.R. Kristensen & J. Madsen.
On-farm
research leading to a dynamic model of a traditional chicken production system. Tanzania
Society of Animal Production and Tanzania Veterinary Association. Joint Annual
Conference, 3-5 December 2002, Arusha, Tanzania.
Nilsson, D. & A.R. Kristensen. 2002. Markov
LIMID Processes for representing and solving renewal problems. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources.
Toulouse, France, September 19-20.
Søllested, T.A. & A.R. Kristensen. 2002. A
sow replacement model using Bayesian updating in a 3-level hierarchic Markov
process. First European Workshop on Sequential Decisions under
Uncertainty in Agriculture and Natural Resources. Toulouse, France,
September 19-20.
Kristensen, A.R. & G. Lien. 2002. Optimal
length of leys in an area with winter damage problems. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources.
Toulouse, France, September 19-20.
Nielsen, B.K. & A.R. Kristensen. 2002. A
model for simultaneous optimization of feeding level and slaughtering policy of
organic steers. First European Workshop on Sequential Decisions under Uncertainty in Agriculture and Natural Resources.
Toulouse, France, September 19-20.
2001:
Kristensen, A.R. & T.A. Søllested. 2001. A
sow replacement model using Bayesian updating in a 3-level hierarchic Markov
process. Dina Research Report No. 96.
Kristensen, A.R. (Ed.) 2001. Dina
Research School: Workshop December 6-7, 2001. Dina Notat No. 95.
Toft, N., A.R. Kristensen & E. Jørgensen. 2001. Exploring the
cost-benefit of vaccines for infectious diseases in slaughter pig production. 11th
International Conference on Production Diseases in Farm Animals.
Houe, H., J.T. Sørensen, L. Otto, A.R. Kristensen, P. Bækbo, J.Y. Blom
& S. Østergaard (eds.). 2001. Animal Health Economics. Proceedings of
workshop held by Research Centre for the Management of Animal Production and
Health at Danish Institute of Agricultural Sciences, Foulum, Denmark - August
17th - 18th, 2001. CEPROS report no. 7.
Søllested, T.A., A.R. Kristensen & T.N. Madsen. 2001. Electronic
monitoring of eating behaviour as an indicator for oestrus in group housed sows.
EFITA 2001. Third European Conference of the European Federation for
Information Technology in Agriculture, Food and the Environment,
Montpellier, France, June 18-20. pp 337-342.
Toft, N., A.R. Kristensen & E. Jørgensen. 2001. Tradeoff's
in modeling epidemic disease in slaughter pig production. EFITA 2001.
Third European Conference of the European Federation for Information Technology
in Agriculture, Food and the Environment, Montpellier, France, June 18-20.
pp 391-396.
Kristensen, A.R. 2001. Computer
demonstration: A general software system for dynamic programming. EFITA
2001. Third European Conference of the European Federation for Information
Technology in Agriculture, Food and the Environment, Montpellier, France,
June 18-20. pp 379-384.
Kristensen, A.R. 2001. Hvilke
faktorer påvirker produktion og dyreomsætning? Dansk Boologisk selskabs seminar
19. og 20. april 2001. Hotel
Pejsegården, Brædstrup, pp 20-25
2000:
Toft, N., A.R. Kristensen & E. Jørgensen. 2000. A framework for decision
support related to an infectious disease in slaughter pig production. Proceedings
of the Symposium on Economic Modelling of Animal Health and Farm Management.
Wageningen, The Netherlands, November 23-24, pp 109-118.
Kristensen, A.R. & E. Jørgensen. 2000.
Multi-level hierarchic Markov
processes as a framework for herd management support. Annals of Operations
Research 94, 69-89.
Østergaard, S., J.T. Sørensen & A.R. Kristensen. 2000.
A stochastic model simulating the feeding-health-production complex in
a dairy herd. Journal of Dairy Science 83, 721-733.
Kristensen, A.R. 2000. A
software system for multi-level hierarchic Markov processes. International Symposium on Pig Herd Management Modelisation.
Lleida, Spain, September 18-20, pp 37-46.
Søllested, T.A. & A.R. Kristensen. 2000. A
multi-process dynamic linear model for oestrus detection in group housed sows by
modeling eating behaviour. International Symposium on Pig Herd Management Modelisation.
Lleida, Spain, September 18-20, pp 117-126.
Kristensen, A.R. (Ed.). 2000. Dinas
Forskerskole: Workshop den 6-7 april 2000. Dina Notat No. 87.
Thysen, I. & A.R. Kristensen (eds.). 2000. Computers and Electronics in Agriculture, Special
Issue, The First European Conference for information Technology in Agriculture.
Vol. 25, No. 3.
1999:
Mourits, M.C.M., R.B.M. Huirne, A.A. Dijkhuizen, A.R. Kristensen &
D.T. Galligan. 1999. Economic optimization of dairy heifer management decisions.
Agricultural
Systems 61, 17-31.
Makulska, J. & A.R. Kristensen. 1999. Economic
optimization of bull fattening. Proceedings of the Second European
Conference of the European Federation for Information Technology in Agriculture,
Food and the Environment. September 27-30, University of Bonn.
Kristensen, A.R. (Ed.). 1999. Dinas
Forskerskole: Workshop den 22-23 april 1999. Dina Notat No. 82.
Mogensen, L., J.T. Sørensen, J. Hindhede, L.H. Nielsen &
A.R. Kristensen. 1999. Effect of space allowance and access to bedding
in slatted-floor housing systems during second-year rearing on subsequent
milk production of primiparious dairy cows. Acta Agriculturæ Scandinavica,
Section A, Animal Science 49, 49-56.
Kristensen, A.R & E. Jørgensen. 1999. Decision
Support Models. Proceedings 25th International Dairy Congress,
21-24 September 1998, Aarhus, Denmark. Vol. III, Future Milk Farming,
145-163.
1998:
Kristensen, A.R. (Ed.). 1998. Dinas
Forskerskole: Workshop den 3-4. december 1998. Dina Notat No. 79.
Jørgensen, E. & A.R. Kristensen. (1998). Edb letter beslutningen.
Landsbladet
Svin, 11, November 1988, p. 18.
Kristensen, A.R. (Ed.). 1998. Dinas
Forskerskole: Workshop den 23-24. april 1998. Dina Notat No. 67.
Kristensen, A.R. 1998. Hvilke
overvejelser ligger bag valg af udsætterkøer? Hvilken indflydelse
har forskellige forhold på udsætningen af køer? Dansk
Boologisk selskabs seminar 17. og 18. september 1998. Hotel Pejsegården,
Brædstrup.
1997:
Kristensen, A.R. (Ed.). 1997. Dinas Forskerskole: Workshop den 4.-5. december
1997. Dina
Notat No. 62.
Toft, N. & A.R. Kristensen. 1997. The parameter input file for the
multi-level hierarchic Markov process. Dina
Notat No. 60.
Kristensen, A.R. & E. Jørgensen. 1997. Simultaneous optimization
of management decisions at the operational and tactical levels in animal
production. In: Huirne et al. (eds.): Risk Management Strategies in Agriculture.
State of the art and future perspectives. Mansholt Studies 7, Chapter
17, pp 215-223.
Kure, H., I. Thysen & A.R. Kristensen (eds.). 1997. Proceedings.
First European Conference for Information Technology in Agriculture.
The Royal Veterinary and Agricultural University, Copenhagen, Denmark,
15-18 June 1997. 500 pp.
Kristensen, A.R. (Ed.) 1997. Proceedings of the Dutch/Danish Symposium
on Animal Health and Management Economics, Copenhagen, January 23-24 1997.
Dina
Notat No. 56.
1996:
Møller, S.H., J.T. Sørensen & A.R. Kristensen. 1996.
The concepts of systematic operation programmes for improvement of health
and welfare management in mink. 4th International Livestock Farming
Systems Symposium, Foulum, Denmark, August 22-23.
Kristensen, A.R. 1996. Textbook notes of herd management: Dynamic programming
and Markov decision processes. Dina
Notat No. 49.
Kristensen, A.R. & E. Jørgensen. 1996. Textbook notes of
herd management: Basic concepts. Dina
Notat No. 48.
Jørgensen, E., C. Dethlefsen & A.R. Kristensen. 1996. Systems
for monitoring and decision support with respect to sow longevity. In:
V. Danielsen (ed.):
NJF-Utredning/Rapport Nr. 111. Proceeding of NJF-seminar
no. 265, Longevity of sows, Research Centre Foulum, Denmark, 27.-28.
March 1996.
Østergaard, S., J.T. Sørensen, J. Hindhede & A.R.
Kristensen. 1996. Technical and economic effects of feeding one vs. multiple
total mixed rations estimated by stochastic simulation under different
dairy herd and management characteristics. Livestock Production Science
45, 23-33.
Kristensen, A.R. & E. Jørgensen. 1996. Multi-level hierarchic
Markov processes as a framework for herd management support. Dina
Research Report No. 41. 25 pp.
Kristensen, A.R. & E. Jørgensen. 1996. Simultaneous
optimization of management decisions at the operational and tactical level
in animal production. In:
Risk Management Strategies in Agriculture:
State of the art and Future Perspectives. EUNITA-Seminar, January 7-10,
1996, Wageningen, The Netherlands.
1995:
Jørgensen, E., E.M. Vestergaard & A.R. Kristensen. 1995. Modelling
of respiratory diseases in slaughter pigs, working paper: Generic disease
model. Dina
Notat No. 40. 18 pp.
Kristensen, A. R. 1995. Book Review: E.H.P. Houben: Economic optimization
of decisions with respect to dairy cow health management. Tijdschrift
voor sociaal wetenschappelijk onderzoek van de landbouw 10, 212-213.
Kristensen, A.R. & E. Jørgensen. 1995. Applicational perspectives
of recent developments in dynamic programming methods for herd management support.Dina
Notat No. 33. 14 pp.
Jørgensen, E. & A. R. Kristensen. 1995. An object oriented
simulation model of a pig herd with emphasis on information flow. Dina
Research Report No. 32.11 pp.
Jørgensen, E. & A.R. Kristensen. 1995. An object oriented
simulation model of a pig herd with emphasis on information flow. In: FACTs
95 March 7, 8, 9, 1995, Orlando, Florida, Farm Animal Computer Technologies
Conference, pp. 206-215.
Kristensen, A.R. & E. Jørgensen. 1995. The application of
Markov decision processes as a framework for decision support in animal
production. In: FACTs 95 March 7, 8, 9, 1995, Orlando, Florida, Farm
Animal Computer Technologies Conference, pp. 136-145.
Clausen, S.M., J.T. Sørensen & A.R. Kristensen. 1995. Technical
and economic effects of culling and reproduction strategies in dairy cattle
herds estimated by stochastic simulation. Acta Agriculturæ Scandinavica
Section A, Animal Science 45, 64-73.
1994:
Kristensen. A.R. 1994. Dynamic programming as a framework for decision
support in animal production. Dina Workshop on Informatics in Agriculture,
8-9 December 1994: Supplementary note. Dina
Notat No. 27. 23 pp.
Houben, E. P. H., R. B. M. Huirne, A. A. Dijkhuizen & A. R. Kristensen.
1994. Optimal replacement of mastitis cows determined by a hierarchic Markov
process. Journal of Dairy Science 77, 2975-2993.
Kristensen, A. R. 1994. A survey of Markov decision programming techniques
applied to the animal replacement problem. European Review of Agricultural
Economics 21, 73-93.
1993:
Kristensen, A. R. 1993. En vurdering af nøgletallene for produktion
på grundlag af principielle overvejelser. Boologisk Selskabs seminar
16./17. september 1993, Pejsegården, Brædstrup. 5 pp.
Kristensen, A. R. 1993. Markov
decision programming techniques applied to the animal replacement problem.
Dissertation for the D.Sc. degree. Dina KVL, Department of Animal Science
and Animal Health. Copenhagen.
Clausen, S., J. T. Sørensen & A. R. Kristensen. 1993. Effect
of culling and reproduction strategies in dairy cattle herds, estimated
by SIMHERD. In: Hogeveen, H.: Proceedings of the Symposium on Herd Health
Decision Support. Utrecht, June 15-16. (Report No. SKBS/B2/93-13).
pp 173-184.
Kristensen, A. R. 1993. A feed ration formulation program for PC to
be used in education at university level. In: Annevelink, E., R. K. Oving
& H. W. Vos (ed): Proceedings XXV CIOSTA-CIGR V Congress, Farm planning, Labour and labour conditions, Computers in agricultural management.
Wageningen, The Netherlands, May 10-13. pp 332-338.
Kristensen, A. R. 1993. Bayesian updating in hierarchic Markov processes
applied to the animal replacement problem. European Review of Agricultural
Economics 20, 223-239.
Kristensen, A. R. 1993. Undervisningen i produktionsstyring. Status
og forslag til handlingsplan. Internal note. 11 pp.
1992:
Kristensen, A. R. 1992. Optimal replacement in the dairy herd: A multi
component system. Agricultural Systems 39, 1-24.
1991:
Kristensen, A. R. 1991. Maximization of net revenue per unit of physical
output in Markov decision processes. European Review of Agricultural
Economics 18, 231-244.
Kristensen, A. R. & I. Thysen. 1991. Ranking of dairy cows for replacement.
Alternative methods tested by stochastic simulation. Acta Agriculturæ
Scandinavica 41, 295-303.
Kristensen, A. R. & I. Thysen. 1991. Economic value of culling information
in the presence and absence of a milk quota. Acta Agriculturæ
Scandinavica 41, 129-135.
1990:
Kristensen, A. R. 1990. Et PC-program til undervisningsbrug. Ugeskrift
for Jordbrug, no 27/28:430-433.
Kristensen, A. R. 1990. Value of culling information with and without
milk quota. I: J. T. Sørensen & I. Thysen (red.): Modelling
of livestock herd production systems. An international workshop. Foulum,
Denmark 22-23 march 1990. 11 pp.
1989:
Kristensen, A. R. 1989. Rangering af malkekøer med henblik på
udskiftning. Forskellige beregningsmetoder testet ved stokastisk simulering.
II. Internal Report. Department of Animal Science. Royal Veterinary
and Agriculturel University. No. 2. 25 pp.
Kristensen, A. R. 1989. Rangering af malkekøer med henblik på
udskiftning. Forskellige beregningsmetoder testet ved stokastisk simulering.
I. Internal Report. Department of Animal Science. Royal Veterinary
and Agricultural University. No. 1. 43 pp.
Kristensen, A. R. 1989. Manual til Replace. PC-version 1.1. OS/2 1.0. Beregning og analyse af udskiftnings-strategier samt simulering. Brugermanual
til udskrivning direkte fra REPLACE-programmellet under operativsystemet
OS/2 (også on-line tilgængelig på skærmen). Internal
note. 42 pp.
Kristensen, A. R. 1989. Manual til Replace. PC-version 1.1. DOS 3.30. Beregning og analyse af udskiftnings-strategier samt simulering. Brugermanual
til udskrivning direkte fra REPLACE-programmellet under operativsystemet
DOS (også on-line tilgængelig på skærmen). Internal
note. 42 pp.
Kristensen, A. R. 1989. Optimal replacement and ranking of dairy cows
under milk quotas. Acta Agriculturæ Scandinavica 39, 311-318.
1988:
Kristensen, A. R. 1988. Dokumentation af programmel til beregning af optimale
udskiftningsstrategier samt tekniske og økonomiske nøgletal
for mælkeproduktionen på bedriftsniveau. (Brugermanual). Internal
Report. Department of Animal Science. Royal Veterinary and Agricultural
University. No. 1. 35 pp.
Kristensen, A. R. 1988. Sammenligning af resultater fra en detaljeret
og en forenklet udskiftningsmodel for malkekoen. Intern report.
11 pp.
Kristensen, A. R. 1988. Optimization techniques in replacement models.
In: S. Korver & J. A. M. van Arendonk: Modelling of Livestock Production
Systems. Kluwer Academic Publishers. Dordrecht. pp 97-104.
Kristensen, A. R. 1988.
Hierarchic Markov processes and their applications
in replacement models. European Journal of Operational Research 35,
207-215.
1987:
Kristensen, A. R. 1987. Optimal replacement and ranking of dairy cows determined
by a hierarchic Markov process. Livestock Production Science 16,
131-144.
1986:
Kristensen, A. R. 1986. A model to describe and predict the production
and food intake of the dairy cow. Acta Agriculturæ Scandinavica
36, 305-317.
Kristensen, A. R. & V. Østergaard. 1986. Skal der lægges
særlig vægt på mælk eller kød? Sortbroget
Kvæg 4-86, 16-17.
Kristensen, A. R. & V. Østergaard. 1986. Økonomisk
virkning af kombinationer af mælkeydelse, tilvækstværdi
og kælvningsinterval i en etableret kvægbesætning af
kombinationsrace. Beretning fra Statens Husdyrbrugsforsøg 615,
123-131.
Kristensen, A. R. 1986. Udskift koen nederst på hitlisten. Landsbladet
no. 13, pp 29-30.
1985:
Kristensen, A. R. 1985. Optimering af malkekoens udskiftning. Ph.D.
thesis. Department of Mathematics and Statistics. Royal Veterinary and
Agricultural University. 173 pp.
1982:
Kristensen, A. R. 1982. Indflydelse af ustabilitet i malkearbejdet på
laktationskurvens niveau og hældning. Internal report. 12
pp.
Kristensen, A. R. 1982. Det mest fordelagtige udskiftningstidspunkt
for malkekoen. Tolvmandsbladet no. 12, pp 589-595.
Kristensen, A. R. & V. Østergaard. 1982. Optimalt udskiftningstidspunkt
for malkekoen fastlagt ved en stokastisk model. Beretning fra Statens
Husdyrbrugsforsøg 533. 146 pp.
Kristensen, A. R. 1982. En model for udskiftning af malkekøer.
Unpublished student's thesis. Department of Mathematics and Statistics.
Royal Veterinary and Agricultural University. 88 pp.
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