Okon, U. A., and T. A. Okon. “Impairment of Sperm Characteristics Unrelated to Hormonal Alterations in Rats Treated With Cimetidine”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 3, no. 4, Feb. 2017, pp. 952-8, https://www.ijrcog.org/index.php/ijrcog/article/view/1343.