K. M. N. Islam, N. . Noor, A. A. . Begum, M. J. Hoque, M. M. . Rishad, and A. . Hossain, “Clinical Profile and Echocardiographic Evaluation of COPD Patients Admitted in a Tertiary Care Hospital”, J. Medicine, vol. 25, no. 2, pp. 115–120, Jul. 2024.