Khatun, Hena, Mohammad Mostafizur Rahman, Hasina Akhter Chowdhury, Mohammad Aminul Islam, Mohammad Touhiduzzaman, Mohammad Mohiuddin Ahmad, Md Rashidul Hassan, - Md Ashrafuzzaman, Md Ashraf Uddin Ahmed, and Md Zakir Hossain. 2020. “Cardiopulmonary Exercise Test in Evaluation of Functional Capacity in Patients With Chronic Obstructive Pulmonary Disease”. Journal of Dhaka Medical College 28 (1):23-27. https://doi.org/10.3329/jdmc.v28i1.45752.