Gumenyuk, B. M. “The Anemia Correction in Chronic Diseases in Perioperative Period While Performing Prosthesis of Aortal Valve”. Klinicheskaia Khirurgiia, Vol. 87, no. 5-6, July 2020, pp. 30-35, doi:10.26779/2522-1396.2020.5-6.30.