Ratnasari, Gamarina Isti, Djamilah Bondan Widjajanti, and Sri Andayani. “Functional Thinking in Mathematics Learning: What and How to Measure It?”. Indonesian Journal of Educational Research and Review 6, no. 3 (October 31, 2023): 553–562. Accessed July 27, 2024. https://ejournal.undiksha.ac.id/index.php/IJERR/article/view/66682.