1.
Isriani WP, Safitri U. Preliminary Observation of Problem-Based Learning to Improve Elementary Students’ Mathematical Problem-Solving Skills. TOFEDU [Internet]. 2025 Jun. 21 [cited 2025 Jul. 13];4(6):1812-9. Available from: http://journal.tofedu.or.id/index.php/journal/article/view/665