LJUNGGREN, W. On the Irreducibility of Certain Trinomials and Quadrinomials. MATHEMATICA SCANDINAVICA, [S. l.], v. 8, p. 65–70, 1960. DOI: 10.7146/math.scand.a-10593. Disponível em: https://www.mscand.dk/article/view/10593. Acesso em: 7 apr. 2025.