@misc{indiciaece72c5f01999,
  title = {Hubbard model in the strong-coupling approximation.},
  author = {BM Elrick and MD Kovarik and AE Jacobs and WG Macready},
  year = {1993},
  doi = {10.1103/physrevb.47.6004},
  url = {https://pubmed.ncbi.nlm.nih.gov/10004548/},
  note = {Source identifier: 10004548}
}