IZZO, Alexander J. A simple proof of the existence of Haar measure on amenable groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 120, n. 2, p. 317–319, 2017. DOI: 10.7146/math.scand.a-25626. Disponível em: https://journals.msp.org/mscand/article/view/321. Acesso em: 24 jul. 2026.