@misc{indiciaeeabeac188192,
  title = {Density matrices derived from polynomial approximations and other models.},
  author = {AK Theophilou and NH March},
  year = {1986},
  doi = {10.1103/physreva.34.3630},
  url = {https://pubmed.ncbi.nlm.nih.gov/9897703/},
  note = {Source identifier: 9897703}
}