Dewanti, Nursyam Anaguna, and Aprisal. “The Influence of the Problem-Based Learning Model on Students’ Ability to Understand Mathematical Concepts”. Rangkiang Mathematics Journal 3, no. 2 (October 31, 2024): 39–45. Accessed November 21, 2024. https://math.ppj.unp.ac.id/index.php/RMJ/article/view/58.