Tsvyakh, O. O. “The State of the Prooxidant-Antioxidant System in the Stomach of Rats With Modeling Chemical Gastritis under Short-Term and Long-Term Hypomelatoninemy”. Medical and Clinical Chemistry, no. 3, Nov. 2016, pp. 63-68, doi:10.11603/mcch.2410-681X.2016.v0.i3.6947.