OKREGLICKI, A. ECG Quiz no. 16. SA Heart Journal, [S. l.], v. 6, n. 3, p. 186–187, 2017. DOI: 10.24170/6-3-1989. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1989. Acesso em: 8 oct. 2025.