STANLEY, A. Billing for pacemakers and electrophysiological procedures. SA Heart Journal, [S. l.], v. 5, n. 4, p. 181–183, 2017. DOI: 10.24170/5-4-2027. Disponível em: https://www.journals.ac.za/SAHJ/article/view/2027. Acesso em: 8 oct. 2025.