NJASTAD, O. Uniform Approximation in Various Function Classes. MATHEMATICA SCANDINAVICA, [S. l.], v. 14, p. 5–18, 1964. DOI: 10.7146/math.scand.a-10700. Disponível em: https://www.mscand.dk/article/view/10700. Acesso em: 29 apr. 2024.