1. Asopa, V.N., (1971), An application of mathematical decision theory to the economic evaluation of water use in crop production, Unpublished PhD thesis, University of Illinois.
2. Biere, A.W. and Lee, I.M. (1972), A model for managing reservoir water releases, American Journal of Agricultural Economics, 54 (3), 411–21.
3. Bowden, J.W. and Bennett, D. (1974), The decide model for predicting superphosphate requirements, Proceedings of a symposium, Phosphate in Agriculture, Australian Institute of Agricultural Science (Victorian Branch).
4. Burt, O.R. (1964), The economics of conjunctive use of ground and surface water, Hilgardia, 36 (2), 31–111.
5. Burt, O.R. (1966), Economic control of groundwater reserves, Journal of Farm Economics, 48 (3), 632–47.