@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/}
}