@misc{indiciae06460d177585,
  title = {Constraints on collective density variables: two dimensions.},
  author = {Obioma U Uche and Frank H Stillinger and Salvatore Torquato},
  year = {2004},
  doi = {10.1103/physreve.70.046122},
  url = {https://pubmed.ncbi.nlm.nih.gov/15600475/},
  note = {Source identifier: 15600475}
}