@article{he2006automatic,
  title={Automatic shape control of triangular B-splines of arbitrary topology},
  author={He, Ying and Gu, Xian-Feng and Qin, Hong},
  journal={Journal of Computer Science and Technology},
  volume={21},
  number={2},
  pages={232--237},
  year={2006},
  publisher={Springer}
}