@article{lei2017quadrilateral,
  title={Quadrilateral and hexahedral mesh generation based on surface foliation theory II},
  author={Lei, Na and Zheng, Xiaopeng and Luo, Zhongxuan and Gu, David Xianfeng},
  journal={Computer Methods in Applied Mechanics and Engineering},
  volume={321},
  pages={406--426},
  year={2017},
  publisher={Elsevier}
}