1.Polman.J.M. and Sliper.D.A.2002.Crop development.translated by Ahmad Arzani,Isfahan Polytechnic University Press.
2.Fahr.W.R.,2003.Crops principles,Translated by Reza Sadrabadi et al,Mashhad Ferdosi University Press.
3.Karimi.H.,1981.Alfalfa,Tehran University Press.
4.Karimi.H.,1981.Caltivation and forage crops development,Tehran University Press.
5.Anonymous.1998.Excerpted from Beekeeper's Handbook,Sammataro /Avitable©1998.Pollination and Bee plants.
www.gears.tucson.ars.ag.gov/beeclass/Pollination.
6.McGregor,S.E.1976.Tnsect Pollination of Cultivated Crop Plants.USDA.
7.Kvasona,E.V.1998.Pollen Tube Growth and Fertilization in Tripped and Untripped Flowers of Alfalfa (Medicago sativa)Inbred Plants.Proceedings of the 36th North American Alfalfa Improvement Conference bozeman,MT August 2-6.
8.Palmer-Jones,T.;Forster,I.W.1972.Measures to Linn.).New Zeal.Jear.Agr.Res.15(1):186-193.
9.Peterson,S.S.,and et.al.1992.Current Status of the Alfalfa Leafcutting Bee,Megachile rotundata,as a Pollinator of Alfalfa Seed.Bee Science 2:135-142.
10. M.P Browse,.1994 .propagation Plan . London .Limited Book International. P191.
11. M. R. Pordel , R. Ebadi , M. Mobli , B. Hatami . Effect of Pollination on Seed Quantity and Quality of Three Winter Cultivars of Canola (Brassica napus L.) in Isfahan. JWSS - Isfahan University of Technology. 2007; 11 (40) :267-276.
12. Agrawal V, Prakash S, Gupta SC (2002). Effective protocol for in vitro shoot production through nodal explants of Simmondsia chinensis. Biol. Plant. 45: 449-453.
13. Apostolo NM, Llorente BE, Princen LH, Rossi C (1996). Rooting and acclimatization of migropropagated jojoba seedlings (in Spanish). Proc. 9th Int. Conf. Jojoba and Its Uses, Catamarca, Argentina, 25 - 30 September 1994, pp. 47-49.