Singh, Jeevan, et al. “Minimal Local Analgesic Dose of Intrathecal Bupivacaine and Ropivacaine in Patients Undergoing Cesarean Section: A Comparative Study”. Journal of Lumbini Medical College, vol. 7, no. 1, Feb. 2019, https://nepjol.info/index.php/JLMC/article/view/24203.