ABDURRAHMAN, S. Image (Pre-image) Homomorfisme Interior Subgrup Fuzzy. Jurnal Fourier, [S. l.], v. 8, n. 1, p. 15–18, 2019. DOI: 10.14421/fourier.2019.81.15-18. Disponível em: https://fourier.or.id/index.php/FOURIER/article/view/79. Acesso em: 16 apr. 2026.