@article{MAN_1995__301_4_165313,
     author = {Dmitri I. Panyushev},
     title = {A restriction theorem and the {Poincare} series for {U-invariants.}},
     journal = {Mathematische Annalen},
     pages = {655--676},
     publisher = {mathdoc},
     volume = {301},
     number = {4},
     year = {1995},
     zbl = {0820.14033},
     url = {http://geodesic.mathdoc.fr/item/MAN_1995__301_4_165313/}
}