LANDERS, D.; ROGGE, L. Pointwise measurability in nonstandard models. MATHEMATICA SCANDINAVICA, [S. l.], v. 67, p. 255–258, 1990. DOI: 10.7146/math.scand.a-12336. Disponível em: https://www.mscand.dk/article/view/12336. Acesso em: 23 nov. 2024.