1. Bradley RG and Crout NMJ (1992) PARCH — User Guide. Tropical Crops Research Institute, University of Nottingham, Sutton Bonnington, Leicester, UK
2. Eschenbacher P and Schmidt B (1987) The model description language SIMPLEX-MDL. In: Adelsberger H and Broeckx F (eds) Discrete Event Simulation and Simulation and Operations Research. Proceedings of the European Simulation Multiconference, 7–10 July, 1987, Vienna, Austria, pp 44–50
3. Malpas J (1987) Prolog: A Relational Language and Its Applications. Prentice-Hall International, Inc, Englewood Cliffs, NJ, USA
4. Muetzelfeldt RI and Sinclair FL (1993) Ecological modelling of agroforestry systems. Agroforestry Abstracts 6: 207–247; Forestry Abstracts 54: 1103–1143
5. Muetzelfeldt RI, Robertson D, Bundy A and Uschold M (1988) The use of Prolog for improving the rigour and accessibility of ecological modelling. Ecol Modelling 46: 7–64