Kashuba, Vitalii, and Nataliia Goncharova. “Optimization of the Process of Primary School Age Children Adaptation: Practical Expertise”. Journal of Education, Health and Sport 8, no. 7 (July 31, 2018): 665–674. Accessed December 26, 2024. https://apcz.umk.pl/JEHS/article/view/6580.