Amirmoradi, S. 1999. Effects of plant density on yield, yield components and some growth characteristics of canola. M.Sc. Thesis, Department of Agronomy, College of Agriculture, University of Guilan. (In Persian with English summary).
Bagherani, N. 2001. Testing several new canola herbicides with emphasize on charlock. Annual report. Gorgan plant pest and disease Research Department. (In Persian with English summary).
Bagherani, N. 2000. Chemical weed control in canola farms with emphasize on cruciferae family. Annual report. Gorgan plant pest and disease Research Department. .(In Persian with English summary).
Bergland, D. R. and McKay, K. 1998. Canola Production. North Dacota State University Press.
Blackshaw, R. E. and Anderson, G.W. and Dekker, J. 1987. Interference of (Sinapis arvensis L.) and Chenopodium album L. in spring rapeseed (Brassica napus L.) Weed Res. 27: 207- 213.
Bowerman, P., Lutman, P. J. W., Palmer, G. M. and Whytock, G.P. 1996. Weed control requirements of oilseed rape under the reformed CAP. Weed Abstr. 45: 47(337).
Ehtashami, S. and Chaeechi, M. R. 2001. Effect of time of hand weeding on species complex, density, and dry weight of weeds in canola (Brasica napus). Iranian J. of Agric.32:25-30. (In Persian with English summer)
Fathi, Gh. A. 2004. Critical period of weed control in canola. The 8th Iranian Agronomy and Plant protection Congress. 284.p. (In Persian with English summary).
Harker, K. N., Blackshaw, R. E. and Dayton, G.W. 2000. Time of weed removal for canola. Ecological Res. 15: 323-327.
Knezevic, S. Z., Evans, S. P., Blankenship, E. E., Vanaker, R.C. and Lindquist, J. L. 2002. Critical period of weed control: the concept and data analysis. Weed Sci. 50: 773-786.
Leach. J.E., Stevenson- Rainbow, A.J. and Mullen, A. 1999. Effects of high plant population on the growth and yield of winter oilseed rape. J. Agric. Sci. 132: 173-180.
Martin, S.G., Van Acker, R.C. and Friesen, L.F. 2001. Critical Period of weed control in spring canola. Weed Sci. 49: 326-333.
Mendham, N. J., Shipway, P.A. and Scott, R.K. 1981. The effects of seed size, autumn nitrogen and plant population density on the response to delayed sowing in winter oil seed rape (Brassica napus). J. Agric. Sci. Camb. 96:417-428.
Miller, M. 2001. Determination of canola stands by hoop Method. Field Crop Res. 78:41-43.
Morrison, M. J., Mcverry, P.B. and Scarth, R. 1990a. Effect of altering plant density on growth characteristics of summer rape. Can. J. Plant Sci. 70: 139- 49.
Morrison, M. J., McVetty, P. B. E and Scarth, R. 1990b. Effect of row spacing and seeding rates on summer rape in Southern Monitoba. Can. J. Plant Sci. 70: 127-137.
Mulugeta, D. and Boerboom, C. M. 2000. Critical time of weed removal in glyphosate- resistant Glycine max. Weed Sci. 48: 35-42.
Murphy, S.D., Yakuba, Y., Weise, S. F. and Swanton, C.J. 1996. Effect of Planting Patterns and inter row cultivation on competition between corn (Zea mays) and late emerging weeds. Weed Sci. 44:856-870.
Rashed Mohassel, M., Rahimian, H. and Banayan, M. 1994. Applied Weed Science.(Translate). Mashhad Jihad Daneshgahi Press. 304 p. (In Persian with English summary).
Sadati, S. M. 2004. Evaluation of critical period of charlock weed control in canola. . M.Sc. Thesis, Department of Agronomy, College of Agriculture and Natural resources, University of Gorgan. (In Persian with English summary).
Shariati, Sh. and Ghazi Shahnizadeh, P. 2000. The canola. Collections. Agricultural-Education-Press. 81p. (In Persian with English summary).
Taj-Gupta, O. P. 2000. Effects of weed control in difference phonological stages of soybean. Weed Res. 3:111-118.
Tawleiat Abolhasani, M. 1995. Effect of planting density and orientation on agronomy and quality characteristics of winter canola. . M.Sc. Thesis, in Agronomy, College of Agriculture, University of Tarbiyet Modarres. (In Persian with English summary).
Van Acker, R. C. 2000. Critical period of weed control in canola. Agri-Food Research & Development initiative. 98-112.
Yaghobi, S. R. 2005. Evaluation of critical period of weed control in Western Tehran. . M.Sc. Thesis, Department of Agronomy, College of Agriculture, University of Mazendran, Sari. (In Persian with English summary).