Regmi, G., R. Shahi, K. Khanal, K. Pyakurel, C. Bohora, and P. Rai. “Comparative Study of Hyperbaric Bupivacaine and Isobaric Ropivacaine for Lower Limb Surgery under Spinal Anesthesia”. Nepal Medical Journal, vol. 2, no. 2, Dec. 2019, pp. 22-27, https://nmj.com.np/nmj/index.php/nmj/article/view/78.