HANSEN, F. Inner one-parameter groups acting on a factor. MATHEMATICA SCANDINAVICA, [S. l.], v. 41, p. 113–116, 1977. DOI: 10.7146/math.scand.a-11706. Disponível em: https://www.mscand.dk/article/view/11706. Acesso em: 5 may. 2024.