KARAN, R.; VERMANI, L. R. Augmentation Quotients of Integral Group Rings. The Journal of the Indian Mathematical Society, [S. l.], v. 54, n. 1-4, p. 107–120, 1989. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/21877. Acesso em: 29 apr. 2024.