M. K. Y, P. S, D. M. V, U. K. AR. A comparative study of epidural tramadol with epidural pentazocine for postoperativeanalgesia in patients undergoing lower abdominal surgeries. Int J Basic Clin Pharmacol [Internet]. 2017 Sep. 23 [cited 2026 Apr. 16];6(10):2441-5. Available from: https://www.ijbcp.com/index.php/ijbcp/article/view/2067