Oliveira, L. H., C. M. Luize, R. S. de Carvalho, M. F. S. Carvalho, D. M. Lago, C. de O. Dietrich, and C. Cirenza. “Persistence of Left Superior Vena Cava in Nonagenarian Undergoing Pacemaker Implant: Case Report: Persistencia De Veia Cava Superior Esquerda E Marca-Passo”. JOURNAL OF CARDIAC ARRHYTHMIAS, vol. 34, no. 2, May 2021, pp. 63-68, https://jca.emnuvens.com.br/jca/article/view/3453.