Srivastava, N., S. Srivastava, S. Ghosh, A. . Kumar, M. . Pande, P. Perumal, and Y. Soni. “Cholesterol Content of Bull Spermatozoa Alters Survival at Ultra-Low Temperatures”. International Journal of Veterinary Sciences Research, vol. 1, no. 3, Sept. 2015, pp. 63-69, doi:10.18488/journal.110/2015.1.3/110.3.63.69.