[1] Campbell, B. “Of primary concern: It’s getting safer, but farming is still the most dangerous industry.” American Agriculturist, 187(9), 1990, pp. 10-30.
[2] Carlson, K.F., S.G. Gerberich, T R.Church, A.D. Ryan, B.H. Alexander, S.J. Mongin, C. Renier, X. Zhang, L.R. French, A. Masten. “Tractor-related injuries: A population-based study of a five-state region in the Midwest.” American Journal of Industrial Medicine, 47, 2005, pp. 254–264.
[3] Nichol, C.I., H. J. Sommer III, D. J. Murphy. “Simplified overturn stability monitoring of agricultural tractors.” Journal of Agricultural Safety and Health 11(1), 2005, pp. 99-108.
[4] رنجبر. ایرج، حمید رضا قاسمزاده، شهاب داوودی. توان موتور و تراکتور، انتشارات دانشگاه تبریز، 1382.
[5] Tajiri, I. 1988-1992, A total of probes and articles, University of Japan.
[6] Handler F. J. Wippl. “Special Machinery for Grassland Harvesting on Steep Slopes in Alpine Regions.” AgEng 2004, Book of Abstracts, Part 1.
[7] Campbell, W. P., S.S. Alswager. “Adjusting equipment now can alleviate harvest losses.” Department: Biological Systems Engineering. (402) 2004, pp. 472-3030.