CRESPO, T. $C_4$-Extensions of $S_n$ as Galois Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 76, p. 214–220, 1995. DOI: 10.7146/math.scand.a-12537. Disponível em: https://www.mscand.dk/article/view/12537. Acesso em: 23 nov. 2024.