CHIN, A.; MILLAR, R. S. ECG Quiz 56 Answer. SA Heart Journal, [S. l.], v. 16, n. 4, p. 338–340, 2019. DOI: 10.24170/16-4-3846. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3846. Acesso em: 8 oct. 2025.