Hafizullah, M., Rehman, A., ul Hassan, M. and Taqweem, M. A. (2011) “Optimal Time for operation in aortic Regurgitation”, Journal of Postgraduate Medical Institute, 16(2). Available at: https://www.jpmi.org.pk/index.php/jpmi/article/view/779 (Accessed: 29 March 2024).