Bedeniuk, O. S., and M. M. Korda. 2017. “Role of Oxidative and Nitrooxidative Stress in Pathogenesis of Periodontitis on the Chronic Gastritis Background”. Medical and Clinical Chemistry, no. 4 (February):11-15. https://doi.org/10.11603/mcch.2410-681X.2016.v0.i4.7248.