HANSEN, Vagn Lundsgaard. On the Homotopy Type of Certain Spaces of Differentiable Maps. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 75–87, 1972. DOI: 10.7146/math.scand.a-11065. Disponível em: https://tidsskrift.dk/math/article/view/11065. Acesso em: 14 aug. 2026.