1. Bekh, I. D. (2018). Osobystіst na shliakhu do dukhovnykh tsіnnostei [Personality on the way to spiritual values]. Kyiv-Chernіvtsі : Bukrek. [in Ukrainian].
2. Busel, V. T. (Ed.). (2005). Velykyi tlumachnyi slovnyk suchasnoi ukrainskoi movy [Large explanatory dictionary of the modern Ukrainian language]. Kyiv; Irpіn: Perun. Retrieved from: http://sum.in.ua/s/zasada [in Ukrainian].
3. Drozd, L. V. (2020). Korektsiino-rozvyvalna prohrama z formuvannia zhyttievoho tsilepokladannia u pidlitkiv v umovakh spetsialnykh zakladiv osvity. [Correctional and developmental program for the formation of life goals in adolescents in special educational institutions]. Naukovyi visnyk Khersonskoho derzhavnoho universytetu. Psykholohichni nauky, 2, 183-190. [in Ukrainian].
4. Kovalenko, V. Ye. (2019a). Vzaiemodiia zakladiv pozashkilnoi ta zahalnoi serednoi osvity u protsesi sotsializatsii ditei z intelektualnymy porushenniamy. [Interaction of out-of- school and general secondary education institutions in the process of socialization of children with intellectual disabilities.]. Pedahohika ta psykholohiia, 61, 81-91. [in Ukrainian].
5. Kovalenko, V. Ye. (2019b). Pozashkіlna osvіta dіtei z osoblyvymy osvіtnіmy potrebamy yak faktor yikh sotsіalіzatsіi. [Features of socialization of children with intellectual disabilities in the ontogenetic dimension]. In Man and environment, trends and prospects. Abstracts of III International Scientific and Practical Conference (Tokyo, Japan. 10-11 February 2020) (рр. 139-141). Tokyo: ISG. [in Ukrainian].