1. Variable metric method for minimization;Davidon;Atomic Energy Commission Research and Development Report ANL-5990,1959
2. Simulation of field water use and crop yield;Feddes,1978
3. Sugar beet;Fick,1975
4. A rapidly convergent descent method for minimization;Fletcher;Computer J.,1963
5. The hierarchical approach to model building in critical evaluations of systems analysis;Goodall,1976