Putri Utami, Dwi Siska, and Enik Setiyawati. “Students’ Mathematical Problem Solving Ability in Elementary School”. Academia Open 70 (December 31, 2022): 10.21070/acopen.7.2022.4064. Accessed November 24, 2024. https://acopen.umsida.ac.id/index.php/acopen/article/view/4064.