1. Arthur, G.H., 1979. Testicular degeneration. Veterinary Reproduction and Obstetrics, 4th Edition. Bailliere Tindall, London, pp. 570–575.
2. Blood, D.C., Radostitis, O.M., 1989. Veterinary Medicine: A Text Book of the Diseases of Cattle, Sheep, Pigs, Goats and Horse, 7th Edition. ELBS, Biailiere Tindall, London, pp. 1354–1355.
3. Faulkner, L.C., Carroll, E.J., 1974. Reproductive failure in males. In: Hafez, E.S.E. (Ed.), Reproduction in Farm Animals. Lea and Febiger, Philadelphia, pp. 373–383.
4. Gutteredge, R.C., 1994. The perennial sesbania species. In: Gutteredge, R.C., Shelton, H.M. (Eds.), Forage tree legumes in tropical agriculture, CAB International, Walingford, UK, pp. 49–64.
5. Leucaena leucocephala as a feed for dairy cows: direct effect on reproduction and residual effect on the calf and lactation;Hamilton;Aus. J. Agric. Res.,1971