BALASUBRAMANIAN, R.; SHOREY, T. N. On the equation $a(x^m-1)/(x-1)=b(y^n-1)/(y-1)$. MATHEMATICA SCANDINAVICA, [S. l.], v. 46, p. 177–182, 1980. DOI: 10.7146/math.scand.a-11861. Disponível em: https://www.mscand.dk/article/view/11861. Acesso em: 3 may. 2024.