1.
Siahaan YH, Siregar SN, Murni A. Implementation of Problem-Based Learning Model to Improve Mathematical Problem-Solving Skills of Grade XI-2 Students of SMAN 19 Pekanbaru. Didact. Math. [Internet]. 2026 Apr. 30 [cited 2026 Jun. 18];8(1):204-22. Available from: https://www.ejournal.unma.ac.id/index.php/dm/article/view/17437