BUDI SURODJO; SAIFULLAH ALI. Struktur Subring Deret Pangkat Tergeneralisasi Sebagai Himpunan Matriks Berindeks Monoid. Limits: Journal of Mathematics and Its Applications, [S. l.], v. 21, n. 2, p. 191–200, 2024. Disponível em: https://journal.its.ac.id/index.php/limits/article/view/5502. Acesso em: 6 dec. 2025.