KATIYAR, V.; KHARE, R. K. Prevalence of pulmonary hypertension in COPD. International Journal of Advances in Medicine, [S. l.], v. 5, n. 2, p. 356–360, 2018. DOI: 10.18203/2349-3933.ijam20181061. Disponível em: https://www.ijmedicine.com/index.php/ijam/article/view/1050. Acesso em: 25 dec. 2025.