%0 Journal Article %A G. Czichowski %T A Lie Theory of Differential Equations and Computer Algebra %J Journal of Lie theory %D 1991 %P 083-092 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JLT_1991_1_1_a8/ %F JLT_1991_1_1_a8