LANDERS, Dieter; ROGGE, Lothar. Pointwise measurability in nonstandard models. Mathematica Scandinavica, Berkeley, CA, United States, v. 67, p. 255–258, 1990. DOI: 10.7146/math.scand.a-12336. Disponível em: https://journals.msp.org/mscand/article/view/1343. Acesso em: 24 jul. 2026.