Beta-blockers in chronic obstructive pulmonary disease: Risk or benefit?. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 26, n. 5, p. 517–8, 2010. DOI: 10.32385/rpmgf.v26i5.10788. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10788. Acesso em: 14 mar. 2026.