1. A deterministic combine-harvester cost model;Boyce;J. agric. Engng Res.,1972
2. A method for minimizing the total cost of combine-harvesting;Audsley;Note 51/1955, natn. Inst. agric. Engng, Silsoe,1972
3. A study of the quantitative changes in grain yield with time in spring barley, 1971;Everett;Note 52/1955, natn. Inst. agric. Engng, Silsoe,1972
4. A simplex method for function minimization;Nelder;Comput. J.,1965
5. The utilization and performance of combine harvesters;MAFF;Farm Mechanization Studies No. 16,1969