Yadav, Rajesh, Niraj Kumar Keyal, and Rupesh Mahato. “A Comparative Study of Bupivacaine and Bupivacaine With Fentanyl for Subarachnoid Block”. Med Phoenix 8, no. 2 (December 31, 2023): 29–33. Accessed May 18, 2024. https://nepjol.info/index.php/medphoenix/article/view/61822.