PETERSEN, N. H. Invariant Weights on Semi-Finite von Neumann Algebras. MATHEMATICA SCANDINAVICA, [S. l.], v. 32, p. 133–144, 1973. DOI: 10.7146/math.scand.a-11450. Disponível em: https://www.mscand.dk/article/view/11450. Acesso em: 19 may. 2024.