CHIN, A.; MILLAR, R. S. ECG Quiz 39 Answer. SA Heart Journal, [S. l.], v. 12, n. 3, p. 170–172, 2017. DOI: 10.24170/12-3-1736. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1736. Acesso em: 8 oct. 2025.