Todurov, B. M., MarkovetsА. V., A. R. Zograbyan, and V. B. Demyanchuk. “Early Results of Ultrasonic Aortic Valve Decalcification”. Ukrainian Journal of Cardiovascular Surgery, no. 1 (24) (May 16, 2016): 45-48. Accessed August 11, 2022. https://cvs.org.ua/index.php/ujcvs/article/view/264.