Some Characteristics Of Ng-Groups. Journal of Pure & Applied Sciences , [S. l.], v. 21, n. 4, p. 11–12, 2022. DOI: 10.51984/jopas.v21i4.2115. Disponível em: https://www.sebhau.edu.ly/journal/jopas/article/view/2115. Acesso em: 30 jan. 2026.