%0 Journal Article %A Dmitrii I. Panyushev %T Complexity and nilpontent orbits. %J Manuscripta mathematica %D 1994 %P 223-238 %V 83 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1994__83_3-4_155958/ %G en %F MM2_1994__83_3-4_155958