MILLAR, R. S.; CHIN, A. ECG Quiz 55 Question. SA Heart Journal, [S. l.], v. 16, n. 3, p. 252, 2019. DOI: 10.24170/16-3-3755. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3755. Acesso em: 8 oct. 2025.