PESKIR, Goran. The Existence of Measurable Approximating Maximums. Mathematica Scandinavica, Berkeley, CA, United States, v. 77, p. 71–84, 1995. DOI: 10.7146/math.scand.a-12550. Disponível em: https://journals.msp.org/mscand/article/view/1123. Acesso em: 25 jul. 2026.