%0 Journal Article %A Bedratyuk, Leonid %T Weitzenböck Derivations and Classical Invariant Theory: I. Poincaré Series %J Serdica Mathematical Journal %D 2010 %P 99-120 %V 35 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2010_35_2_a0/ %G en %F SMJ2_2010_35_2_a0