%0 Journal Article %A Calle Jacobsson %T On the double Poincaré series of the enveloping algebras of certain graded Lie algebras. %J Mathematica Scandinavica %D 1982 %P 45-58 %V 51 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1982__51_166801/ %F MS2_1982__51_166801