AUBERT, K. E. Convex Ideals in Ordered Group Algebras and the Uniqueness of the Haar Measure. MATHEMATICA SCANDINAVICA, [S. l.], v. 6, p. 181–188, 1958. DOI: 10.7146/math.scand.a-10542. Disponível em: https://www.mscand.dk/article/view/10542. Acesso em: 28 apr. 2024.