Borulu, F., U. Arslan, E. Çalik, and B. Erkut. “Postoperative Clinical Outcome of Aortic Valve Surgery in Elderly Patients and the Effect of Advanced Age on Atrial Fibrillation: A Comparative Retrospective Study”. International Surgery Journal, vol. 8, no. 2, Jan. 2021, pp. 509-15, doi:10.18203/2349-2902.isj20210361.