Rahayuningsih, Sri, Sirajuddin Sirajuddin, and Nasrun Nasrun. “Cognitive Flexibility: Exploring students’ Problem-Solving in Elementary School Mathematics Learning”. JRAMathEdu (Journal of Research and Advances in Mathematics Education) 6, no. 1 (December 28, 2020): 59–70. Accessed November 17, 2025. https://journals2.ums.ac.id/jramathedu/article/view/9343.