TVERBERG, H. On cubic factors of certain trinominals. MATHEMATICA SCANDINAVICA, [S. l.], v. 53, p. 178–184, 1983. DOI: 10.7146/math.scand.a-12024. Disponível em: https://www.mscand.dk/article/view/12024. Acesso em: 6 may. 2024.