Žakelj A, Štemberger T, Klančar A. An Empirical Study on Basic and Conceptual Knowledge, Procedural Knowledge and Problem Solving among Primary School Students. International Journal of Instruction [Internet]. 2025 Oct. 1 [cited 2025 Oct. 3];18(4):627-50. Available from: https://e-iji.net/ats/index.php/pub/article/view/837