FORNAESS, J. E. Uniform Approximation on Manifolds. MATHEMATICA SCANDINAVICA, [S. l.], v. 31, p. 166–170, 1972. DOI: 10.7146/math.scand.a-11422. Disponível em: https://www.mscand.dk/article/view/11422. Acesso em: 3 may. 2024.