Gautam, B., and M. Karki. “Caudal Block Analgesia for Paediatric Infra-Umbilical Surgery: A Prospective Observational Study”. Journal of Kathmandu Medical College, vol. 8, no. 3, Sept. 2019, pp. 122-30, https://jkmc.com.np/ojs3/index.php/journal/article/view/15.