%0 Journal Article %A François Brunault %T On Zagier's conjecture for base changes of elliptic curves %J Documenta mathematica %D 2013 %P 395-412 %V 18 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/404/ %R 10.4171/dm/404 %F 10_4171_dm_404