%0 Journal Article %A Rimlinger, Frank %T -trees and normalization of pseudogroups. %J Experimental mathematics %D 1992 %P 95-114 %V 1 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/EXMA_1992__1_2_225817/ %G en %F EXMA_1992__1_2_225817