MIRACI, M., M. Lezha, I. Temali, L. Matua, V. Papajani, and E. Petrela. “COST-EFFECTIVENESS OF BETA BLOCKERS AND THE SURVIVAL OF THE PATIENTS WITH HEART FAILURE IN THE CARDIOLOGY CENTER IN TIRANA”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 7, no. 7, July 2015, pp. 261-4, https://www.innovareacademics.in/journals/index.php/ijpps/article/view/6250.