PATERSON, Alan L. T. Amenability and locally compact semigroups. MATHEMATICA SCANDINAVICA, [S. l.], v. 42, p. 271–288, 1978. DOI: 10.7146/math.scand.a-11753. Disponível em: https://tidsskrift.dk/math/article/view/11753. Acesso em: 13 aug. 2026.