Shah, Azmat Ali, Khalid Rafique, and Mujahid Islam. “Can Difficult Intubation Be Accurately Predicted Using Upper Lip Bite Test?”. Journal of Postgraduate Medical Institute 28, no. 3 (July 25, 2014). Accessed May 3, 2024. https://jpmi.org.pk/index.php/jpmi/article/view/1553.