1. Babu Rao, K. and Rama Mohana Rao, A., 1990a. Body, scrotal, testicular measurements and semen characteristics in 50% and 75% exotic crossbred bulls. Indian Veterinary Journal, 67,238–241.
2. Babu Rao, K. and Rama Mohana Rao, A., 1990b. Body, scrotal, testicular biometrics and semen characteristics among different genetic groups in 75% crossbred bulls. Indian Veterinary Journal, 67, 330–334.
3. Bhoite, U. Y., Sutar, D. A. and Ulmek, B. R., 2005. Effect of season and period on semen characteristics of two and three breed Gir crosses. The Indian Journal of Animal Reproduction, 26(1), 43–45.
4. Brito, L. F.C., Silva, A. E.D.F., Unanian, M. M.,Dode, M. A.N., Barbos, R. T., Kastelic J. P., 2004.Sexual development in early- and late-maturing Bos indicus and Bos indicus × Bos taurus crossbred bulls in Brazil. Theriogenology, 62, 1198–1217.
5. Casas, E. ,Lunstra, D. D. ,Cundiff, L. V. and Ford, J. J., 2007.Growth and pubertal development of F1 bulls from Hereford, Angus, Norwegian Red, Swedish Red and White, Friesian, and Wagyu sires. Journal of Animal Science, 85, 2904–2909.