Gnedenko, Yana, and Evdokim Kryukov. “Study of the Difficulties Arising in the Process of Implementing a Validated Study of a Group of Adolescents With Mental Developmental Disorders”. Education Policy, no. 3 (May 15, 2022): 95–105. Accessed November 7, 2026. https://education-policy.owebs.ru/article/view/9981.