BALASUBRAMANIAN, R.; SHOREY, T. N. On the equation $a(x^m-1)/(x-1)=b(y^n-1)/(y-1)$. Mathematica Scandinavica, Berkeley, CA, United States, v. 46, p. 177–182, 1980. DOI: 10.7146/math.scand.a-11861. Disponível em: https://journals.msp.org/mscand/article/view/1785. Acesso em: 25 jul. 2026.