%0 Journal Article %A Ernst-Ulrich Gekeler %T The distribution of group structures on elliptic curves over finite prime fields %J Documenta mathematica %D 2006 %P 119-142 %V 11 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/206/ %R 10.4171/dm/206 %F 10_4171_dm_206