ZULKARNAIN, I. . THE EFFECT OF THE PROBLEM BASED LEARNING MODEL ON MATHEMATICAL PROBLEM-SOLVING ABILITY. Tesseract: International Journal of Geometry and Applied Mathematics, [S. l.], v. 2, n. 3, p. 299–304, 2024. DOI: 10.57254/tess.v2i3.45. Disponível em: https://tesseract.nindikayla.com/index.php/home/article/view/45. Acesso em: 14 feb. 2026.