%0 Journal Article %A Eskin, Alex %T Counting problems and semisimple groups %J Documenta mathematica %D 1998 %P 539-552 %V ICM Berlin 1998, Vol. II %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_1998__S8__a30/ %G en %F DOCMA_1998__S8__a30