Ulfania Julisa, Maimunah, and Kartini. “Development of Contextual-Based Mathematics Teaching Materials to Facilitate students’ Mathematical Problem-Solving Ability on Systems of Linear Inequalities in Two Variables”. Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika 9, no. 1 (April 30, 2026): 259–272. Accessed June 13, 2026. https://journal.upp.ac.id/index.php/absis/article/view/4132.