%0 Journal Article %A Gerard van der Geer %A Toshiyuki Katsura %T On a stratification of the moduli of K3 surfaces %J Journal of the European Mathematical Society %D 2000 %P 259-290 %V 2 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/s100970000021/ %R 10.1007/s100970000021 %F JEMS_2000_2_3_a2