CHIN, A. .; MILLAR, R. S. ECG Quiz 61 Question. SA Heart Journal, [S. l.], v. 18, n. 3, p. 186, 2021. DOI: 10.24170/18-3-4903. Disponível em: https://www.journals.ac.za/SAHJ/article/view/4903. Acesso em: 8 oct. 2025.