MILLAR, R. S.; CHIN, A. ECG Quiz 51: Question. SA Heart Journal, [S. l.], v. 15, n. 3, p. 218, 2018. DOI: 10.24170/15-3-3189. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3189. Acesso em: 8 oct. 2025.