Adienbo, O. M., A. Nwafor, and D. V. Dapper. “Impairments in Testicular Function Indices in Male Wistar Rats: A Possible Mechanism for Infertility Induction by Xylopia Aethiopica Fruit Extract”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 1, Feb. 2017, pp. 71-75, https://www.ijrcog.org/index.php/ijrcog/article/view/1812.