@article{10_4064_aa113_1_3,
     author = {Nir Ailon and Z\'eev Rudnick},
     title = {Torsion points on curves and
 common divisors of $a^k-1$ and $b^k-1$},
     journal = {Acta Arithmetica},
     pages = {31--38},
     publisher = {mathdoc},
     volume = {113},
     number = {1},
     year = {2004},
     doi = {10.4064/aa113-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa113-1-3/}
}