MILLAR, R. S. Answer to ECG Quiz no. 32. SA Heart Journal, [S. l.], v. 10, n. 4, p. 640–642, 2017. DOI: 10.24170/10-4-1786. Disponível em: https://www.journals.ac.za/SAHJ/article/view/1786. Acesso em: 8 oct. 2025.