Matayev , Berik, Kadisha Shalgynbayeva, Botagoz Sarsenbayeva, Kaziyev Karas, and Olga Kolyukh. 2021. “The ‘Self- Concept’ of Students: Scientific Bases and Features of Research”. Cypriot Journal of Educational Sciences 16 (6):3184-95. https://doi.org/10.18844/cjes.v16i6.6532.