Neznanov, N. G.; Kruglov, L. S.; Serpov, V. Y.; Atayev, I. H.; Kiseleva, I. V.; Chesnokov, A. A. Mental Disorders in Patients at Geriatrician Attendance: Basic Variants and Influence on Social Functioning (The Experience in Russia). Eur. J. Ment. Health 2021, 16, 53-63.