Rahayuningsih S, Sirajuddin S, Nasrun N. Cognitive flexibility: exploring students’ problem-solving in elementary school mathematics learning. J.Res.Adv.Math.Educ [Internet]. 2020 Dec. 28 [cited 2025 Nov. 17];6(1):59-70. Available from: https://journals2.ums.ac.id/jramathedu/article/view/9343