SAHOO, T.; DAVVAZ, B.; PANACKAL, H.; KEDUKODI, B. S.; KUNCHAM, S. P. Relative Essential Ideals in N-groups. Tamkang Journal of Mathematics, [S. l.], v. 54, 2021. DOI: 10.5556/j.tkjm.54.2023.4136. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4136. Acesso em: 4 jul. 2022.