Rajbhandari, P., P. Pradhan, and G. Dangal. “Spinal Anaesthesia Failure Among Women Undergoing Caesarean Section in Kirtipur Hospital”. Nepal Journal of Obstetrics and Gynaecology, vol. 10, no. 1, Aug. 2015, pp. 36-38, https://nepjol.info./index.php/NJOG/article/view/13193.