Iushchuk, M.V., I.P. Balmasova, E.N. Nikolaeva, S.D. Arutiunov, and V.N. Tsarev. “Relations of Associations of Periodontal-Pathogenic Bacteria and Gingivitis Development Among Students of Medical Higher Educational Institution Suffering Academic Stress”. Clinical Dentistry (Russia), no. 2 (June 1, 2017): 18—24. Accessed May 19, 2024. http://www.kstom.ru/ks/article/view/0082-04.