@article{GDZPPN002109581, title = {An isoperimetric comparison theorem.}, journal = {Inventiones mathematicae}, volume = {110}, year = {1992}, pages = {37-48}, zbl = {0770.53031}, url = {http://dml.mathdoc.fr/item/GDZPPN002109581} }
Kleiner, Bruce. An isoperimetric comparison theorem.. Inventiones mathematicae, Tome 110 (1992) pp. 37-48. http://gdmltest.u-ga.fr/item/GDZPPN002109581/