OKREGLICKI, A. ECG Quiz no. 14. SA Heart Journal, [S. l.], v. 6, n. 1, p. 52–53, 2017. DOI: 10.24170/6-1-2012. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2012. Acesso em: 8 oct. 2025.