Hoque, Harisul, Khurshed Ahmed, Mohammad Faisal Kabir, and Nilufar Fatema. “A Comparative Study With Carvedilol and Ivabradine in Ischaemic Heart Disease Patients With Heart Failure”. University Heart Journal 15, no. 2 (August 18, 2019): 60-62. Accessed October 31, 2020. https://www.banglajol.info/index.php/UHJ/article/view/42648.