Novitasari, Fitri, and Walid Walid. “Development of Android-Based Linear Program Teaching Materials With an Ethnomatematics Approach to Improve Students’ Mathematical Problem Solving Ability”. Unnes Journal of Mathematics Education 11, no. 1 (March 31, 2022): 1-11. Accessed December 21, 2024. https://journal.unnes.ac.id/sju/ujme/article/view/55806.