%0 Journal Article %A Foth, Philip %A Otto, Michael %T A symplectic approach to van den Ban's convexity theorem %J Documenta mathematica %D 2006 %P 407-424 %V 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2006__11__a3/ %G en %F DOCMA_2006__11__a3