Varghese, Arun, and Taznim Mohamed. “A Comparison of Mallampati Scoring, Upper Lip Bite Test and Sternomental Distance in Predicting Difficult Intubation”. International Journal of Research in Medical Sciences 4, no. 7 (January 3, 2017): 2645–2648. Accessed October 11, 2025. https://www.msjonline.org/index.php/ijrms/article/view/981.