BUGEAUD, Yann; MIHAILESCU, Preda. On the Nagell-Ljunggren equation $(x^n - 1)/(x - 1) = y^q$. Mathematica Scandinavica, Berkeley, CA, United States, v. 101, n. 2, p. 177–183, 2007. DOI: 10.7146/math.scand.a-15038. Disponível em: https://journals.msp.org/mscand/article/view/659. Acesso em: 24 jul. 2026.