MILLAR, R. S.; CHIN, A. ECG Quiz 40 Answer. SA Heart Journal, [S. l.], v. 12, n. 4, p. 230–232, 2017. DOI: 10.24170/12-4-1713. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1713. Acesso em: 8 oct. 2025.