@misc{contardo2022emptiness,
  title={The emptiness inside: Finding gaps, valleys, and lacunae with geometric data analysis},
  author={Gabriella Contardo and David W. Hogg and Jason A. S. Hunt and Joshua E. G. Peek and Yen-Chi Chen},
  year={2022},
  eprint={2201.10674},
  archivePrefix={arXiv},
  primaryClass={astro-ph.IM},
  url={https://arxiv.org/abs/2201.10674}
}