Singh, Gurcharan. “Comparative Analysis Comparing Age-Based Formulae and Ultrasonography for Predicting Pediatric Endotracheal Tube Size”. International Journal of Pharmaceutical and Biological Science Archive 5, no. 03 (May 30, 2017). Accessed November 25, 2024. http://ijpba.in/index.php/ijpba/article/view/459.