@article{zeng2011volumetric,
  title={Volumetric colon wall unfolding using harmonic differentials},
  author={Zeng, Wei and Marino, Joseph and Kaufman, Arie and Gu, Xianfeng David},
  journal={Computers \& graphics},
  volume={35},
  number={3},
  pages={726--732},
  year={2011},
  publisher={Elsevier}
}