@misc{indiciae41085e9811c5,
  title = {Hubbard model for a cubic cluster.},
  author = {J Callaway and DP Chen and Y Zhang},
  year = {1987},
  doi = {10.1103/physrevb.36.2084},
  url = {https://pubmed.ncbi.nlm.nih.gov/9943052/},
  note = {Source identifier: 9943052}
}