Saleev, R.A., N.S. Fedorova, and L.R. Saleeva. “Oral Health and Quality of Life: Historical Milestones and Future Research Directions and Opportunities (Literature Review)”. Clinical Dentistry (Russia), no. 4 (January 13, 2021): 92—98. Accessed May 18, 2024. http://www.kstom.ru/ks/article/view/0096-14.