Anon. 1982. Evaluation Report. Tested at Humboldt. Prairie Agricultural Machinery Institute. ISSN
0383-3445.
Balls, R. C. 1985. Horticultural Engineering Technology: Field Machinery. Macmillan Pub.
Chesson, J. H., Johnson, H. and Brooks, C. R. 1978. Mechanical harvesting investigations for fresh market onions. T. ASAE. 21(5): 838-842.
Harrison, H. P. and Atkins, R. P. 1981a. Soil reacting forces for a rod weeder from field measurements.
T. ASAE. 24(3): 590-592.
Harrison, H. P. and Atkins, R. P. 1981b. Rod weeder Soil Forces from Field Measurements. T. ASAE. Paper No. 79-1040.
Harrison, H. P. and Bai, X. 1990. Rod weeder soil reaction force for different rod shapes and speeds.
T. ASAE. 33(5): 1445-1448.
Hunt, D. 1977. Farm Power and Machinery Management: Laboratory Manual and Workbook. Iowa State University Press.
Klenin, N. I., Popov, I. F. and Sakun, V. A. 1986. Agricultural Machines: Theory of Operation, Computation of Controlling Parameters and the Conditions of Operation. Russian Translation.
Series 31.
Kydd, H. D., Frehlich, G. E. and Boyden, A. R. 1984. Tillage power requirements in western Canada. ASAE. Paper No. 84-1027.
Mayberry, K. S. 2000. Market Onions. US Cooperative Extension Sample Cost to Establish and Produce. 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). Final Research Report. Agricultural Research and Education Organization. Agricultural Engineering Research Institute. Jahad Agricultural Ministry. (in Farsi)
Payne, P. C. J. 1956. The relationship between the mechanical properties of soil and the performance of simple cultivation implements. J. Agric. Eng. 1, 23-50.
Srivastava, A., Goering, C. and Rohrbach, R. 1993. Engineering Principles of Agricultural Machines. American Society of Agricultural Engineers (ASAE).
Taki, O. 2011. Development of a front-mounted rod-digger for harvesting non-row basis onions. Annual Research Report. Agricultural Engineering Research Institute. Agriculture and Natural Resources Research Center of Isfahan. (in Farsi)
Viramontes, J. A. B. 1980. Harvester with Mechanical Rod Weeder and Soil Agitator. United State Patent. No. 4232745.
)