CIVIN, P. Ideals in the Second Conjugate Algebra of a Group Algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 11, p. 161–174, 1962. DOI: 10.7146/math.scand.a-10663. Disponível em: https://www.mscand.dk/article/view/10663. Acesso em: 20 may. 2024.