Ruli, Redo Martila, Dadang Juandi, Jarnawi Afgani Dahlan, and Septiani Yugni Maudy. 2025. “From Arithmetic to Algebra: Students’ Epistemological Obstacles”. SJME (Supremum Journal of Mathematics Education) 9 (2):371-82. https://doi.org/10.35706/sjme.v9i2.205.