Toumpoulis, Ioannis K., Constantine E. Anagnostopoulos, Joseph J. DeRose, and Daniel G. Swistel. “Early and Midterm Outcome After Off-Pump Coronary Artery Bypass Grafting in Patients With Left Ventricular Dysfunction”. The Heart Surgery Forum 7, no. 6 (January 4, 2005): E539-E545. Accessed October 24, 2020. https://journal.hsforum.com/index.php/HSF/article/view/675.