ABDURRAHMAN, S. . Ideal Fuzzy Semiring Atas Level Subset. Jurnal Fourier, [S. l.], v. 11, n. 1, p. 1–6, 2022. DOI: 10.14421/fourier.2022.111.1-6. Disponível em: https://fourier.or.id/index.php/FOURIER/article/view/135. Acesso em: 23 mar. 2023.