@article{yin2011computing,
  title={Computing shortest words via shortest loops on hyperbolic surfaces},
  author={Yin, Xiaotian and Li, Yinghua and Han, Wei and Luo, Feng and Gu, Xianfeng David and Yau, Shing-Tung},
  journal={Computer-Aided Design},
  volume={43},
  number={11},
  pages={1449--1456},
  year={2011},
  publisher={Elsevier}
}