%0 Journal Article %A J. Hilgert %A K.-H. Neeb %A W. Plank %T Symplectic Convexity Theorems %J Journal of Lie Theory %D 1993 %P 123-136 %V 3 %N 2 %U http://geodesic.mathdoc.fr/item/JOLT_1993_3_2_a0/ %F JOLT_1993_3_2_a0