%0 Journal Article %A David Masser %A Umberto Zannier %T Torsion points on families of simple abelian surfaces and Pell's equation over polynomial rings (with an appendix by E. V. Flynn) %J Journal of the European Mathematical Society %D 2015 %P 2379-2416 %V 17 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/560/ %R 10.4171/jems/560 %F JEMS_2015_17_9_a9