Stewart , Jamie, Igor Canisso, Giorgia Podico, Edgar Garrett, and Fabio Lima. “Effects of Nerve Growth Factor β Added to Extenders for Cryopreservation of Electro Ejaculated and Epididymal Harvested Bull Semen”. Clinical Theriogenology 11, no. 3 (September 1, 2019): 441. Accessed March 30, 2026. https://clinicaltheriogenology.net/index.php/CT/article/view/10210.