%0 Journal Article %A Dimitri Koutroufiotis %T On a Conjectured Characterization of the Sphere. %J Mathematische Annalen %D 1973 %P 211-218 %V 205 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1973__205_162491/ %F MAN_1973__205_162491