OKREGLICKI, A. ECG Quiz no. 11. SA Heart Journal, [S. l.], v. 5, n. 2, p. 88, 2017. DOI: 10.24170/5-2-2051. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2051. Acesso em: 8 oct. 2025.