[1]
Nurhalimah, A., Mandailina, V., Mahsup and Syaharuddin 2022. Measuring the Difficulty Level of Mathematical Problems Based on Polya Criteria. Journal of Education Research and Evaluation. 6, 4 (Dec. 2022), 595–607. DOI:https://doi.org/10.23887/jere.v6i4.46316.