SCHMIDT, E. J. P. Georg. On Multiplicative Lebesgue Integration and Families of Evolution Operators. Mathematica Scandinavica, Berkeley, CA, United States, v. 29, p. 113–133, 1971. DOI: 10.7146/math.scand.a-11039. Disponível em: https://journals.msp.org/mscand/article/view/2313. Acesso em: 25 jul. 2026.