K. Jain, S. K. Sethi, S. L. Yadav, V. Mathur, B. Thada, and D. Garg, “Dexmedetomidine enhances the efficacy of 0.25% ropivacaine for postoperative analgesia in pediatric caudal epidurals”, apic, vol. 22, no. 2, pp. 199-206, Jan. 2019.