HASAN, R. T. S.; MACHMUD, T.; PAUWENI, K. A. Y.; ISMAIL, S. Development of the "GAULL" Mathematics Learning E-Module Using Crossword Games on Flat-side Space Buildings. Numerical: Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 8, n. 1, p. 125–138, 2024. DOI: 10.25217/numerical.v8i1.4951. Disponível em: https://www.journal.iaimnumetrolampung.ac.id/index.php/numerical/article/view/4951. Acesso em: 14 jul. 2025.