For citations:

Astapov D.A., Demidov D.P., Semenova E.I. PROSTHESIS OF AORTIC VALVE BY STENTED AND STENTLESS BIOLOGICAL PROSTHESES: INTERMEDIATE ANALYSIS OF RESULTS. Grekov's Bulletin of Surgery. 2017;176(4):12-17. (In Russ.) https://doi.org/10.24884/0042-4625-2017-176-4-12-17