Ray, Dibyendu. “Effects of Nicotine on Sperm Health and Semen Quality: A Review Based on Animal Studies”. Journal of Drug Delivery and Therapeutics 9, no. 4-A (August 30, 2019): 754-758. Accessed April 4, 2020. http://jddtonline.info/index.php/jddt/article/view/3512.