HAFIZULLAH, M.; REHMAN, A.; UL HASSAN, M.; TAQWEEM, M. A. Optimal Time for operation in aortic Regurgitation. Journal of Postgraduate Medical Institute, [S. l.], v. 16, n. 2, 2011. Disponível em: https://www.jpmi.org.pk/index.php/jpmi/article/view/779. Acesso em: 14 aug. 2022.