Sõrmus, M., Radišić, J., Leijen, Äli and Uibu, K. (2026) “Learning motivation in the context of mathematics among 6-13-year-old students: A systematic literature review of concepts and instruments”, Eesti Haridusteaduste Ajakiri. Estonian Journal of Education, 14(1), pp. 139–166. doi: 10.12697/eha.2026.14.1.06.