OKREGLICKI, A. ECG Quiz no. 26. SA Heart Journal, [S. l.], v. 9, n. 1, p. 44, 2017. DOI: 10.24170/9-1-1876. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1876. Acesso em: 8 oct. 2025.