SILABAN, A. M.; SIMBOLON, K.; LUMBANTORUAN, J. H. Kesulitan Siswa dalam Memecahkan Masalah Barisan dan Deret Aritmatika. Brillo Journal, [S. l.], v. 1, n. 2, p. 95–101, 2022. DOI: 10.56773/bj.v1i2.14. Disponível em: https://journal.sncopublishing.com/index.php/brillojournal/article/view/14. Acesso em: 12 may. 2025.