Boonmak, P., S. Boonmak, N. Hoontanee, and K. Pothiruk. “A Study of Retained Endotracheal Tube After Neurosurgical Anesthesia: Incidence and Associated Factors”. Srinagarind Medical Journal, vol. 24, no. 4, Nov. 2013, pp. 321-5, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13041.