ALFSEN, E. M. A Simplified Constructive Proof of the Existence and Uniqueness of Haar Measure. Mathematica Scandinavica, Berkeley, CA, United States, v. 12, p. 106–116, 1963. DOI: 10.7146/math.scand.a-10675. Disponível em: https://journals.msp.org/mscand/article/view/2643. Acesso em: 8 sep. 2026.