Suraj Kumar, Manoj Tripathi, Deepak Malviya, Sujeet Rai, Sumit Kumar, and Manoj Kumar Giri. “Clinical Comparison of Epidural Clonidine and Verapamil With Ropivacaine in Abdominal Hysterectomy; A Prospective, Randomized, Controlled Study.”. Academia Anesthesiologica International 5, no. 1 (May 30, 2020): 91-95. Accessed April 29, 2026. https://www.aijournals.com/index.php/aan/article/view/1505.