Anon. 2010. Agricultural Productions in Iran. Agricultural Research and Education Organization. Jahad-e-Agricultural Ministry. (in Farsi)
Asgari-Ardeh, A. 2003. Disk Soil-Working Implements. Nashr-e-Daneshgahi Pub. Tehran. Iran. (in Farsi)
Balls, R. C. 1985. Horticultural Engineering Technology: Fixed Equipment and Buildings. Macmillan Pub. LTD.
Chesson, J. H., Johnson, H., Brooks, C. R., Curley R. G., Burkner, P. F. and Perkins, R. M. 1978. Mechanical harvesting investigations for fresh market onions. T. ASAE. 21(5): 838-842.
Hamasaki, R., Valenzuela, H. and Shimabuku, R. 1999. Bulb Onion Production in Hawaii. College of Tropical Agriculture and Human Resources (CTAHR). University of Hawaii at Manoa. Honolulu. Hawaii.
Hunter, J., Chesson, J. H., Mayberry, K. S., Curley, R. G. and Brooks, C. R. 1977. Machine harvesting fresh market onions. California Agric. 31(6): 4-7.
Laryushin, N. P. and Laryushin, A. M. 2009. Energy-saving onion harvesting technology. Russian Agric. Sci. 35(1): 66-67.
Mayberri, K. S. and Meister, H. 2003. Sample Cost to Establish and Produce Market Onions. U. C. Cooperative Extension. University of California and the United States Department of Agricultural Cooperating.
Mozafari, M. and Kazemeinkhah, K. 2000. Design, development and evaluation of suitable onion harvester for small farms (laboratory scale). Research Report. Agricultural Engineering Research Institute.
(in Farsi)
Rusinek, T., Mishanec, J. and Lorbeer, J. 2008. Analysis of onion management practices as they relate to levels of Aspergillus niger (Black Mold) and development of IPM scouting protocols for Blackmold. Available at: http//www.nysiom.cornell.edu/grantspgm/projects/project00/veg/rusinek.pdf.
Srivastava, A., Goering, C. E. and Rohrbach, R. P. 1993. Engineering Principles of Agricultural Machines. American Society of Agricultural Engineers. Michigan. USA.
Viramontes, J. A. B. 1980. Harvester with Mechanical Rod Weeder and Soil Agitator. United State Patent. No. 4232745.