1. Hrjachkov VV, Kislicin DP, Dobrovol'skij AA. Gepatopankreatobiliarnaja hirurgija. Hanty-Mansijsk. 2011. (In Russ.).
2. Nikiforova NA, Karapetjan TA, Dorshakova NV. Assessment of peptic ulcer incidence among population of european north оf Russia. Jekologija cheloveka. 2015;12:53-58. (In Russ.).
3. Zajcev OV, Natal'skij AA. Up-to-date trends in the morbidity of the complicated peptic ulcer disease. Fundamental'nye issledovanija. 2011;9-3:400-403. (In Russ.).
4. Boytsov SA. Mechanisms of reduction in coronary heart disease mortality in different countries of the world. Profilakticheskaja medicina. 2013;5:9-19. (In Russ.).
5. Роль социальных факторов риска в развитии язвенной болезни в Курской области