1. Abidine, A. Z., B. C. Heidman, S. K. Upadhyaya, and D. J. Hills. 2004. Auto guidance system operated at high speed causes almost no tomato damage. California Agriculture 58: 44-47.
2. Aassi, M. R. 2007. General Surveying. Sharif University. Tehran. (In Farsi).
3. Arslan, S., and T. S. Colvin. 2002. An evaluation of the response of yield monitors and combines to varying yields. Precision Agriculture 3: 107-122.
4. Goudarzi mehr, S., and H. R. Matin far. 2010. Remote sensing technology and its capabilities in precision agriculture. Second National Conference on Agriculture and Sustainable Development (Opportunities and challenges). Islamic Azad University of Shiraz. (In Farsi).
5. Jose, R., M. Rodriguez, A. Flor, E. Sanz, and A. Gavela. 2006. Comparison of GPS receiver accuracy and precision in forest environments: Practical recommendations regarding methods and receiver selection. 23rd FIG Conference, Munich, Germany.
6. Keicher, R., and H. Seufert. 2000. Automatic guidance for agricultural vehicles in Europe. Computers and Electronics in Agriculture 25: 169-194.
7. Kindra, S., T. Windholz, and K. Weber. 2006 .Comparing GPS Receivers: A Field Study. URISA Journal 18: 21-26.
8. Nationa Cartographic Center. 2013. Hoda National System. Available from: http://hodasystem.net/? page_id=131.
9. Perez, M., J. Ruiz, J. Carballio, and J. Agura. 2011. Assessing of correction signal for assisted guidance systems in agricultural vehicles. Precision Agriculture 12: 639-652.
10. Garmin Ltd. 2010. Garmin GPS MAP78 series owner’s manual. Garmin international Inc.