Popov, V. V., and O. O. Bolshak. “Original Method of Posterior Aortoplasty for Aortic Valve Replacement in Cases With Narrow Aortic Ostium”. Ukrainian Journal of Cardiovascular Surgery, no. 1 (34) (March 11, 2019): 24-26. Accessed March 29, 2024. https://cvs.org.ua/index.php/ujcvs/article/view/5.