CHIN, A.; MILLAR, R. S. ECG Quiz 50 Answer. SA Heart Journal, [S. l.], v. 15, n. 2, p. 140–142, 2018. DOI: 10.24170/15-2-3049. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3049. Acesso em: 8 oct. 2025.