OKREGLICKI, A. Answer to ECG Quiz no. 16. SA Heart Journal, [S. l.], v. 6, n. 3, p. 190–191, 2017. DOI: 10.24170/6-3-1991. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1991. Acesso em: 8 oct. 2025.