GRAVESEN, Jens. Whitney $C^\infty$-topologies and the Baire property. Mathematica Scandinavica, Berkeley, CA, United States, v. 52, p. 58–60, 1983. DOI: 10.7146/math.scand.a-11993. Disponível em: https://journals.msp.org/mscand/article/view/1630. Acesso em: 25 jul. 2026.