1. ASAE, ANSI/ASAE S296.5 DEC. 03. General Terminology for Traction of Agricultural Traction and Transport Devices and Vehicles. MI, USA: ASAE, St. Joseph; 2003.
2. Reed J, Turner PE. Slip measurement using dual radar guns. In: An ASAE/CSAE meeting presentation, Paper No. 93-1031; 1993.
3. A new slip monitor for traction equipment;Thansandote;Trans ASAE,1977
4. Wyoming Energy Conservation Office. Fuels for agriculture: a guide to energy management. Wyoming: Wyoming Future Farmers of America; 1983.
5. Optimum tractor weight for maximum drawbar horsepower;Sheets;Trans ASAE,1967