Roughness in Anti Semigroup. Journal of Pure & Applied Sciences , [S. l.], v. 21, n. 4, p. 251–253, 2022. DOI: 10.51984/jopas.v21i4.2194. Disponível em: https://sebhau.edu.ly/journal/jopas/article/view/2194. Acesso em: 29 jan. 2026.