@article{02123942,
title = {Symmetrization of starlike domains in Riemannian manifolds and a qualitative generalization of Bishop's volume comparison theorem.},
journal = {Advances in Geometry},
volume = {4},
year = {2004},
pages = {341-363},
doi = {10.1515/advg.2004.020},
zbl = {1079.53025},
language = {en},
url = {http://dml.mathdoc.fr/item/02123942}
}
Fukuoka, Ryuichi. Symmetrization of starlike domains in Riemannian manifolds and a qualitative generalization of Bishop's volume comparison theorem.. Advances in Geometry, Tome 4 (2004) pp. 341-363. doi : 10.1515/advg.2004.020. http://gdmltest.u-ga.fr/item/02123942/