GRAVESEN, J. Whitney $C^\infty$-topologies and the Baire property. MATHEMATICA SCANDINAVICA, [S. l.], v. 52, p. 58–60, 1983. DOI: 10.7146/math.scand.a-11993. Disponível em: https://www.mscand.dk/article/view/11993. Acesso em: 27 apr. 2024.