@article{afastalgorithmforcomputingthedeficiency,
  title = {A Fast Algorithm for Computing the Deficiency Number of a Mahjong Hand},
  author = {Xueqing Yan and Yongming Li and Sanjiang Li},
  year = {2021},
  eprint = {2108.06832},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2108.06832v1},
}