'Iza, Baetul, and Hesti Khasanah. “The Effectiveness Of Problem Based Learning Model Base On Open-Ended To Improve Mathematical Creative Thinking Skills ”. International Journal of Research in Mathematics Education 1, no. 1 (July 31, 2023): 55–66. Accessed July 4, 2025. https://ejournal.uinsaizu.ac.id/index.php/ijrme/article/view/8558.