@article{01975349,
title = {Sector estimates for Kleinian groups.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {58},
year = {2001},
pages = {461-471},
zbl = {1068.20053},
language = {en},
url = {http://dml.mathdoc.fr/item/01975349}
}
Sharp, R. Sector estimates for Kleinian groups.. Portugaliae Mathematica. Nova Série, Tome 58 (2001) pp. 461-471. http://gdmltest.u-ga.fr/item/01975349/