@misc{indiciae17e9723be6bf,
  title = {Two-dimensional negative-U Hubbard model.},
  author = {A Moreo and DJ Scalapino},
  year = {1991},
  doi = {10.1103/physrevlett.66.946},
  url = {https://pubmed.ncbi.nlm.nih.gov/10043947/},
  note = {Source identifier: 10043947}
}