Abdel-Razek, Abdel-Razek Kh., et al. “Effect of Sperm Separation Methods on Morphology and Functions of Frozen Buffalo Spermatozoa”. Journal of Advanced Veterinary Research, vol. 7, no. 1, Jan. 2017, pp. 18-23, https://advetresearch.com/index.php/AVR/article/view/6.