ALFSEN, E. M. A Simplified Constructive Proof of the Existence and Uniqueness of Haar Measure. MATHEMATICA SCANDINAVICA, [S. l.], v. 12, p. 106–116, 1963. DOI: 10.7146/math.scand.a-10675. Disponível em: https://www.mscand.dk/article/view/10675. Acesso em: 19 mar. 2024.