%0 Journal Article %A Li, Ke-Zheng %T Actions of group schemes (I) %J Compositio Mathematica %D 1991 %P 55-74 %V 80 %N 1 %I Kluwer Academic Publishers %U http://www.numdam.org/item/CM_1991__80_1_55_0/ %G en %F CM_1991__80_1_55_0