Žakelj, Amalija, Tina Štemberger, and Andreja Klančar. “An Empirical Study on Basic and Conceptual Knowledge, Procedural Knowledge and Problem Solving Among Primary School Students”. International Journal of Instruction 18, no. 4 (October 1, 2025): 627–650. Accessed October 3, 2025. https://e-iji.net/ats/index.php/pub/article/view/837.