Terletska, Yuliana M. “Fundamentals and Main Provisions of the Functional-Procedural Concept of Mental Deprivation”. Journal of Intellectual Disability - Diagnosis and Treatment 9, no. 5 (October 26, 2021): 514–525. Accessed February 27, 2025. http://lifescienceglobalca.com/index.php/jiddt/article/view/8404.