@inproceedings{yong-jin2015semi-continuity,
title={Semi-continuity of skeletons in 2-manifold and discrete Voronoi approximation},
author={Yong-Jin Liu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160819120002380497258},
booktitle={IEEE Transactions on Pattern Analysis and Machine Intelligence},
volume={37},
number={9},
pages={1938-1944},
year={2015},
}

Yong-Jin Liu. Semi-continuity of skeletons in 2-manifold and discrete Voronoi approximation. 2015. Vol. 37. In IEEE Transactions on Pattern Analysis and Machine Intelligence. pp.1938-1944. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160819120002380497258.