1. 1. Mitrofanova LB (2007) Valvular heart defects. A new look at etiology, pathogenesis, morphology. Medical publishing house. St. Petersburg 192.
2. 2. Storozhakov GI, Gendlin GE, Miller OA (2015) Data from the National Medical Research Center for Cardiovascular Surgery named after AN Bakulev, 2001. Quoted from Heart valve disease. Praktika Publishing House. Moscow 198.
3. 3. Storozhakov GI, Gendlin GE, Miller OA (2015) Heart valve disease. Praktika Publishing House M 198.
4. 4. Meshalkin EN, Bushmanova GM (1986) Chronic septic endocarditis is a new topical problem in internal medicine. Septic endocarditis in heart disease surgery. Novosibirsk: Nauka 3-13.
5. 5. Meshalkin EN, Bushmanova GM (1987) Chronic septic endocarditis is an urgent problem in cardiac surgery. Septic endocarditis in heart disease surgery. Novosibirsk 2-6.