@article{nonnegativespatialfactorization,
  title = {Nonnegative spatial factorization},
  author = {F. William Townes and Barbara E. Engelhardt},
  year = {2021},
  eprint = {2110.06122},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2110.06122v1},
}