D. K., Sowmiya, Ramanathan R., and Ramamoorthy R. “A Randomised Controlled Trial on Effect of Topical Anaesthetics on Injection Pain During Immunization in Infants of 6 Weeks to 6 Months of Age With Pentavac Vaccine”. International Journal of Contemporary Pediatrics 10, no. 3 (February 23, 2023): 295–299. Accessed March 26, 2026. https://www.ijpediatrics.com/index.php/ijcp/article/view/5244.