OKREGLICKI, A. ECG Quiz no. 13. SA Heart Journal, [S. l.], v. 5, n. 4, p. 186, 2017. DOI: 10.24170/5-4-2029. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2029. Acesso em: 8 oct. 2025.