OKREGLICKI, A. Answer to ECG Quiz no. 22. SA Heart Journal, [S. l.], v. 8, n. 1, p. 62–64, 2017. DOI: 10.24170/8-1-1928. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1928. Acesso em: 8 oct. 2025.