SUND, Terje. Remarks on locally compact group extensions. Mathematica Scandinavica, Berkeley, CA, United States, v. 69, p. 199–210, 1991. DOI: 10.7146/math.scand.a-12378. Disponível em: https://journals.msp.org/mscand/article/view/1293. Acesso em: 24 jul. 2026.