Shukhtina, I. N., and A. A. Avramenko. “Features of the Distribution of the Concentration on the Mucous Stomach of Active and Inactive Forms of Helicobacterial Infection in Patients With Chronic Non-Atrophic Gastritis, Suffering and Not Suffering from Chronic Constipation”. Journal of Education, Health and Sport, vol. 9, no. 9, Sept. 2019, pp. 1254-6, https://apcz.umk.pl/JEHS/article/view/7638.