M. Yalcin, D. Ay, T. Turk, S. Yavuz, and A. F. Ozyazicioglu, “Impact of previous percutaneous coronary intervention on postoperative outcomes of coronary artery bypass grafting”, Eur Res J, vol. 2, no. 3, pp. 170–176, Nov. 2016, doi: 10.18621/eurj.2016.5000190033.