CAHYO, Bagas Dwi; SUROTO, Suroto; MARYANI, Sri. CHARACTERIZATION OF NORMAL FUZZY SUBGROUP. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 10, n. 2, p. 351–360, 2025. DOI: 10.31943/mathline.v10i2.791. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/791. Acesso em: 24 dec. 2025.