Chawla, D. K., D. J. K. . Golwalkar, D. N. . Shaikh, and D. P. . Chavre. “An Observational Study of Correlation of Cardiac Manifestations With Severity of COPD”. VIMS Health Science Journal, vol. 8, no. 4, Dec. 2021, pp. 141-4, doi:10.46858/vimshsj.8404.