%0 Journal Article %A Kraft, Hanspeter %A Procesi, Claudio %T Graded morphisms of $G$-modules %J Annales de l'Institut Fourier %D 1987 %P 161-166 %V 37 %N 4 %I Institut Fourier %C Grenoble %U http://www.numdam.org/articles/10.5802/aif.1115/ %R 10.5802/aif.1115 %G en %F AIF_1987__37_4_161_0