Tarafder, Kamrul Hassan, Pran Gopal Datta, and Ahmed Tariq. “The Aging Voice”. Bangabandhu Sheikh Mujib Medical University Journal 5, no. 1 (June 29, 2012): 83–86. Accessed April 19, 2024. https://banglajol.info/index.php/BSMMUJ/article/view/11033.