Ibrahimov, F., I. Ismayilov, O. Musayev, K. Musayev, S. Elesgerli, F. Aliyev, and T. Cahangirov. “Short and Long-Term Follow-up After Coronary Artery Bypass Surgery or Percutaneous Coronary Intervention Among Elderly Patients With Multivessel Disease”. Annals of Medical Research, vol. 28, no. 9, Sept. 2021, pp. 1626-31, http://www.annalsmedres.org/index.php/aomr/article/view/3898.