Kamath, Vidyashri, and Adeline Lasrado. 2017. “Efficacy and Safety of Intravenous Acetaminophen Versus Intravenous Butorphanol As Post-Operative Analgesic in Obstetrics and Gynecology: A Comparative Study”. International Journal of Advances in Medicine 1 (3):222-29. https://www.ijmedicine.com/index.php/ijam/article/view/484.