Bugeaud Y, Mihailescu P. On the Nagell-Ljunggren equation $(x^n - 1)/(x - 1) = y^q$. Math. Scand. [Internet]. 2007 Dec. 1 [cited 2024 Apr. 30];101(2):177-83. Available from: https://www.mscand.dk/article/view/15038