@inproceedings{william1972the,
title={The residual limit sets of Kleinian groups},
author={William Abikoff},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203227499591144},
booktitle={Acta Mathematica},
volume={130},
number={1},
pages={127-144},
year={1972},
}