1- پیمانیفرد، ب.، ملکپور، ب. و فائزیپور، م.، 1373. معرفی گیاهان مهم مرتعی و راهنمای کشت آنها برای مناطق مختلف ایران. نشریة شمارة 24 مؤسسه تحقیقات جنگلها و مراتع، تهران. ایران.
2- Duke, J.A. 1981. Handbook of Legumes of World Economic Importance, Plenum, New York, USA.
3- Hollington, P.A., Marshall, A.H., Hides, D.H., 1989. Effect of seed crop management on potential seed yield of contrasting white clover varieties. II. Seed yield components and potential seed yield. Grass Forage Science, 44:189-193.
4- Humphreys, M.O. 1991. A genetic approach to the multivariate differentiation of perennial ryegrass (Lolium perenne L.) populations. Heredity, 66: 437-443.
5- Jahufer, M.Z.Z., Cooper, M. and. Brien, L.A, 1994. Genotypic variation for stolon and other morphological attributes of white clover (Trifoliume repens L.) populations and their influence on herbage yield in summer rainfall region of New South Wales. Australian Journal of Agricultural Research 45: 703-720.
6- Marshall, A.H., Hollington, P.A., Hides, D.H.. 1989. Effect of seed crop management on the potential seed yield of contrasting white clover varieties. I. Inflorescence production. Grass Forage Science: 44:181-188.
7- Moussavi, M. 1979. List of plants of Evin Herbarium, Family: Leguminosae (Genus: Trifolium). Iranian agricultural and natural resource organization, Plant pest and disease research institute, Publication Tehran, Iran. No. 14. Pp 50.
8- Pederson, C.A. 1995. White clover and other perennial clovers. In: “Forages” (Eds. Barnes, R.F., D.A. Miller and C.J. Nelson), Iowa State University Press, Iowa, USA, pages 227-236.
9- Peters, J.P. and Martinelli, J.A., 1989. Hierarchical cluster analysis as a tool manages variation in germplasm collections. Theoretical and Applied Genetics. 78: 42-48.
10- Piano, E. and Annicchiarico, P. 1995. Persistence of Landio white clover ecotypes and its relationship with other agronomic traits. Grass and forage science: 50: 195-198.
11-Rhodes, I. 1987. Characterization of white clover. In: "Collection, Characterization and utilization of genetics of temperate forage grasses and legumes" (Eds. B.F. Tyler). International Board for Plant Genetics Resources (IBPGR). Rome, Italy.