MILLAR, R. S.; CHIN, A. ECG Quiz 51: Answer. SA Heart Journal, [S. l.], v. 15, n. 3, p. 226–228, 2018. DOI: 10.24170/15-3-3190. Disponível em: https://www.journals.ac.za/SAHJ/article/view/3190. Acesso em: 8 oct. 2025.