Aftab, S., S. Rashdi, A. Bari, M. I. Darr, and A. Mehmood. “PEROPERATIVE TRANSESOPHAGEAL ECHOCARDIOGRAPHY: CLINICAL BENEFIT DURING CARDIAC SURGERY”. Journal of the Dow University of Health Sciences (JDUHS), vol. 3, no. 1, Jan. 2008, pp. 22-26, https://jduhs.com/index.php/jduhs/article/view/1304.