@inproceedings{johannes2005tolerance,
title={Tolerance in geometric constraints solving},
author={Johannes Wallner, Hans-Peter Schrocker, and Shi-Min Hu},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160825095550223324442},
booktitle={Reliable Computing},
volume={11},
number={3},
pages={235-251},
year={2005},
}
Johannes Wallner, Hans-Peter Schrocker, and Shi-Min Hu. Tolerance in geometric constraints solving. 2005. Vol. 11. In Reliable Computing. pp.235-251. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160825095550223324442.