SCHMIDT, E. J. P. G. On Multiplicative Lebesgue Integration and Families of Evolution Operators. MATHEMATICA SCANDINAVICA, [S. l.], v. 29, p. 113–133, 1971. DOI: 10.7146/math.scand.a-11039. Disponível em: https://www.mscand.dk/article/view/11039. Acesso em: 2 may. 2024.