Kovalchuk, A. O., T. V. Kravchenko, S. I. Estrin, S. O. Antonyuk, Y. S. Akobirov, and O. V. Chizhikova. “First Clinical Experience of Combined Treatment of Patients With Atrial Septal Defect and Atrial Fibrillation Using a Two-Staged Approach”. Ukrainian Journal of Cardiovascular Surgery, no. 2 (31) (May 14, 2018): 122-126. Accessed August 11, 2022. https://cvs.org.ua/index.php/ujcvs/article/view/87.