An observational study of correlation of cardiac manifestations with severity of COPD. VIMS Health Science Journal, [S. l.], v. 8, n. 4, p. 141–144, 2021. DOI: 10.46858/vimshsj.8404. Disponível em: https://www.vimshsj.edu.in/index.php/main/article/view/318. Acesso em: 15 jun. 2026.