Choudhury, A Allam, Tuhin Sultana, Md Abul Hasnat Joarder, and Kamrul Hassan Tarafder. “A Comparative Study of Elective and Emergency Tracheostomy”. Bangladesh Journal of Otorhinolaryngology 14, no. 2 (September 7, 2009): 57–62. Accessed July 17, 2024. https://banglajol.info/index.php/BJO/article/view/3282.