%0 Journal Article %A Wu-yi Hsiang %A Wu-Teh Hsiang %T On the uniqueness of isoperimetric solutions and imbedded soap bubbles in non-compact symmetric spaces, I. %J Inventiones mathematicae %D 1989 %P 39-58 %V 98 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__98_1_143719/ %F IM_1989__98_1_143719