OKREGLICKI, A. ECG Quiz no. 25. SA Heart Journal, [S. l.], v. 8, n. 4, p. 276–277, 2017. DOI: 10.24170/8-4-1891. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1891. Acesso em: 8 oct. 2025.