RAMADHANI, Rahmi. The enhancement of mathematical problem solving ability and self-confidence of students through problem based learning. Jurnal Riset Pendidikan Matematika, [S. l.], v. 5, n. 1, p. 127–134, 2018. DOI: 10.21831/jrpm.v5i1.13269. Disponível em: https://journal.uny.ac.id/index.php/jrpm/article/view/13269. Acesso em: 18 may. 2025.