%0 Journal Article %A Christopher B. Croke %T An isoembolic pinching theorem. %J Inventiones mathematicae %D 1988 %P 385-388 %V 92 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1988__92_1_143572/ %F IM_1988__92_1_143572