SYAHWAL, Apriliani; SURADI; RUSLI. Mathematics Learning Process Students Grade IX in Pandemic COVID-19 Era. ARRUS Journal of Mathematics and Applied Science, [S. l.], v. 1, n. 2, p. 81–88, 2021. DOI: 10.35877/mathscience639. Disponível em: https://journal.arrus.id/index.php/mathscience/article/view/639. Acesso em: 25 apr. 2026.