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@article{IM_1988__92_1_143572, author = {Christopher B. Croke}, title = {An isoembolic pinching theorem.}, journal = {Inventiones mathematicae}, pages = {385--388}, publisher = {mathdoc}, volume = {92}, number = {1}, year = {1988}, zbl = {0648.53025}, url = {http://geodesic.mathdoc.fr/item/IM_1988__92_1_143572/} }
Christopher B. Croke. An isoembolic pinching theorem.. Inventiones mathematicae, Tome 92 (1988) no. 1, pp. 385-388. http://geodesic.mathdoc.fr/item/IM_1988__92_1_143572/