WALTER, Martin E. Convolution on the reduced dual of a locally compact group. Mathematica Scandinavica, Berkeley, CA, United States, v. 37, p. 145–166, 1975. DOI: 10.7146/math.scand.a-11597. Disponível em: https://journals.msp.org/mscand/article/view/2074. Acesso em: 25 jul. 2026.