Tohura, S, A Parvin, AB Siddique, M Assaduzzaman, BF Zohara, and MF Islam. “Factors Affecting the Semen Quality of Breeding Bulls”. Bangladesh Veterinarian 35, no. 1-2 (January 6, 2019): 32–39. Accessed December 7, 2021. https://www.banglajol.info/index.php/BVET/article/view/53385.