Purwoko, Riawan Yudi, Betty Kusumaningrum, Annis Nur Laila, and Erni Puji Astuti. “Development of Open Ended Based Mathematics E-Modules to Enhance Students’ Critical Thinking Ability”. Mathline : Jurnal Matematika dan Pendidikan Matematika 8, no. 1 (February 24, 2023): 194–206. Accessed March 10, 2025. https://mathline.unwir.ac.id/index.php/Mathline/article/view/337.