PANJAITAN, Jelika. Development of e-lkpd based on problem learning to improving students’ mathematical problem-solving ability on statistics material class VIII junior high school. Jurnal THEOREMS (The Original Research of Mathematics), [S. l.], v. 11, n. 1, p. 73–89, 2026. DOI: 10.31949/th.v11i1.16263. Disponível em: https://www.ejournal.unma.ac.id/index.php/th/article/view/16263. Acesso em: 16 jun. 2026.