@inproceedings{shi-min2002an,
title={An Extension algorithm for B-spline curves by curve unclamping},
author={Shi-Min Hu, Chiew-Lan Tai, and Song-Hai Zhang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160825214808071792452},
booktitle={Computer Aided Design},
volume={34},
number={5},
pages={415-4191},
year={2002},
}
Shi-Min Hu, Chiew-Lan Tai, and Song-Hai Zhang. An Extension algorithm for B-spline curves by curve unclamping. 2002. Vol. 34. In Computer Aided Design. pp.415-4191. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160825214808071792452.