K. S. K. Singh, V. K. Sharma, S. Shouche, S. Sasidharan, and G. K. Dhillon, “A comparison of high thoracic epidural anaesthesia versus conventional intravenous opioids in pediatric patients undergoing corrective open heart surgery for ventricular septal defect”, Int J Adv Med, vol. 8, no. 8, pp. 1142–1153, Jul. 2021.