Perea , Fernando, Roberto A. Palomares, Maria S. Ferrer, Rumualdo González, Andrzej T. Palasz, Jormaryory Rosales, H. Hector Nava, Alejandro Hoyos-Jaramillo, and Eleazar Soto-Belloso. 2017. “A Field Study To Compare Post-Thaw Sperm Progressive Motility And Pregnancy Rate Using Brahman Bull Semen Frozen In Milk Based Extender Containing Egg Yolk Or Soybean Lipids Extract”. Clinical Theriogenology 9 (1):37-45. https://clinicaltheriogenology.net/index.php/CT/article/view/10080.