READE, M. O. On Newtonian vector functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 4, p. 153–156, 1956. DOI: 10.7146/math.scand.a-10465. Disponível em: https://www.mscand.dk/article/view/10465. Acesso em: 4 may. 2024.