SIAHAAN, M. M. L.; FITRIANI, F.; MANEK, P. Hypothetical Learning Trajectory: To Determine The Solution of Linear Equation System in Elementary Row Operation. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 8, n. 1, p. 246–255, 2021. DOI: 10.31943/mathline.v8i1.379. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/379. Acesso em: 10 mar. 2025.