Berat Cihan, H., O. Soysal, M. Gulculer, O. Gulcan, and H. Ozdemir. “Effects of Coronary Artery Bypass Operations on Relieving Complaints of Angina Pectoris”. Annals of Medical Research, vol. 2, no. 3, May 2021, pp. 0268-71, http://annalsmedres.org/index.php/aomr/article/view/2440.