Holisin, Iis, and Shoffan Shoffa. “Analysis of Students’ Errors in Solving Differential Problems Based on Castolan Theory”. Mosharafa: Jurnal Pendidikan Matematika 12, no. 3 (July 30, 2023): 587–598. Accessed November 22, 2024. https://journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/829.