MILLAR, R. S.; CHIN, A. ECG Quiz 63 Question. SA Heart Journal, [S. l.], v. 19, n. 2, p. 94, 2022. DOI: 10.24170/19-2-5613. Disponível em: https://www.journals.ac.za/SAHJ/article/view/5613. Acesso em: 8 oct. 2025.