Mohiuddin, Muhammad, Abdul Wadud Chowdhury, Kazi Nazrul Islam, Mohammad Gaffar Amin, Abu Thaher Mohammad Mahfuzul Hoque, Chinmoy Saha, AKM Fazlul Kader, and Azizul Haque. 2021. “Echocardiographic Evaluation of Cardiac Status in Patients With Chronic Obstructive Pulmonary Disease”. Bangladesh Medical Research Council Bulletin 46 (3):204-10. https://doi.org/10.3329/bmrcb.v46i3.52256.