KALLIONIEMI, H. On representation formulars for intermediate derivates. MATHEMATICA SCANDINAVICA, [S. l.], v. 39, p. 315–326, 1976. DOI: 10.7146/math.scand.a-11665. Disponível em: https://www.mscand.dk/article/view/11665. Acesso em: 29 apr. 2024.