Trzeciak, P. “Ivabradine ? Is It ?beautiful? Drug for Patients With Coronary Artery Disease and Left Ventricular Dysfunction? BEAUTIFUL Study”. Medycyna Faktow (J EBM), Vol. 2, no. 1(2), Mar. 2009, pp. 17-23, https://www.journalsmededu.pl/index.php/jebm/article/view/2677.