Kusdinar U, Sukestiyarno S, Isnarto I, Istiandaru A. Krulik and Rudnik Model Heuristic Strategy in Mathematics Problem Solving. Int. J. Emerg. Math. Educ. [Internet]. 2017 Aug. 18 [cited 2024 Nov. 4];1(2):205-10. Available from: https://journal.uad.ac.id/index.php/IJEME/article/view/5708