%0 Journal Article %A William Stein %A Brian Conrad %A Bas Edixhoven %T $J_1(p)$ has connected fibers %J Documenta mathematica %D 2003 %P 331-408 %V 8 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/146/ %R 10.4171/dm/146 %F 10_4171_dm_146