1. Achten J (1997). Models, Methods and Databases for Labour and Machinery in Agriculture. Comparison of task time models for field work of Denmark, Germany, The Netherlands and Finland. IMAG-DLO Wageningen The Netherlands. CIGR-Working Group 17. 45 pages + 70 pages technical appendix.
2. Uniform Terminology for Agricultural Machinery Management;ASAE Standards, S495.1,2005
3. The economics of precision guidance with auto-boom control for farmer-owned agricultural sprayers;Batte;Computers and Electronics in Agriculture,2006
4. Applied Dynamic Programming;Bellman,1962
5. Bochtis D (2008). Planning and control of a fleet of agricultural machines for optimal management of field operations. Ph.D. thesis, AUTh, Faculty of Agriculture, Department of Agricultural Engineering, Greece.