@misc{indiciae5a98ac522da8,
  title = {Spin gaps and bilayer coupling in YBa2Cu3O7- delta and YBa2Cu4O8.},
  author = {AJ Millis and H Monien},
  year = {1994},
  doi = {10.1103/physrevb.50.16606},
  url = {https://pubmed.ncbi.nlm.nih.gov/9976049/},
  note = {Source identifier: 9976049}
}