Swathi Gajji, and R.Rajeshwar Reddy. “Comparative Study of Epidural 0.2% Ropivacine and Fentanyl With 0.2% Levobupivacine and Fentanyl for Postoperative Pain Relief for Modified Radical Mastectomy”. International Journal of Health and Clinical Research 5, no. 1 (January 16, 2022): 673–679. Accessed April 7, 2026. https://www.ijhcr.com/index.php/ijhcr/article/view/5136.