SITUMORANG, Ruth Sahana; HUTAPEA, Nahor Murani; ARMIS. Development of problem-based learning materials on linear programming to facilitate students’ mathematical problem-solving skills. Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika, [S. l.], v. 7, n. 1, p. 1–11, 2024. DOI: 10.30606/absis.v7i1.2339. Disponível em: https://journal.upp.ac.id/index.php/absis/article/view/2339. Acesso em: 27 sep. 2024.