Achi, J. N., N. P. Achi, C. Alphonsus, I. Mallam, and I. U. Gadzama. “Effect of Vitamin C Levels in Chicken Egg Yolk Extender on Sperm Motility in Chilled Stored Bull Semen”. Nigerian Journal of Animal Production (July 9, 2024): 165–166. Accessed September 16, 2026. https://njap.org.ng/index.php/njap/article/view/4555.