SIREGAR, T.; AMIR, A. Math Challenges: Making Learning Attractive and Challenging. SATKRIYA : Jurnal Pengabdian Kepada Masyarakat, [S. l.], v. 1, n. 2, p. 1–7, 2023. Disponível em: https://jurnal.sttnlampung.ac.id/index.php/satkriya/article/view/64. Acesso em: 12 may. 2026.