@inproceedings{dennis1984extending, title={Extending holomorphic motions}, author={Dennis P. Sullivan, and William P. Thurston}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203307293729392}, booktitle={Acta Mathematica}, volume={157}, number={1}, pages={243-257}, year={1984}, }