1. Ahmad, E., Ahmad, N., Naseer, Z., Aleem, M., Khan, M.S., Ashiq, M. and Younis, M., 2011. Relationship of age to body weight , scrotal circumference , testicular ultrasonograms, and semen quality in Sahiwal bulls. Tropical Animal Health and Production, 43, 159–164.
2. Ahmed, M.M.M., Makawi, S.A. and Gadir, A.A., 1997. Reproductive performance of Saanen bucks under tropical climate. Small Ruminant Research, 26, 151–155.
3. Ajao, E.O., Akinyemi, M.O., Ewuola, E.O. and Osaiyuwu, O.., 2014. Body Measurement of Red Sokoto Bucks in Nigeria and Their Relationship with Testicular Biometrics Iranian. Journal of Applied Animal Science, 4, 761–767.
4. Akpa, G.N., Suleiman, I. O. and Alphonsus, C., 2012. Relationships Between Body and Scrotal Measurements, and Semen Characteristics in Yankasa Ram. Continental Journal of Animal and Veterinary Research, 4, 7–10.
5. Al-Ghaban, A.M., Tabbaa, M.J., Kridli, R.T., 2004. Factors affecting semen characteristics and scrotal circumference in Damascus bucks. Small Ruminant Research. 53, 141–149.