CHIN, A.; MILLAR, R. ECG Quiz 60 Answer. SA Heart Journal, [S. l.], v. 18, n. 2, p. 152–155, 2021. DOI: 10.24170/18-2-4888. Disponível em: https://www.journals.ac.za/SAHJ/article/view/4888. Acesso em: 8 oct. 2025.