Shafa, Amir, Seyedjalal Hashemi, Seyedmorteza Heidari, and Zeynab Talebi. “Comparison of Pre-Emptive Analgesic Effect of Rectal Ketamine and Caudal Bupivacaine in Pediatric Lower Abdominal Surgery”. Iranian Journal of Pediatric Surgery 4, no. 2 (December 4, 2018): 61–70. Accessed April 24, 2024. https://journals.sbmu.ac.ir/irjps/article/view/22280.