@misc{indiciae23e965317a87,
  title = {Surface impurity problem in the Hubbard model: A renormalization-group study.},
  author = {AG Rojo and R Allub and MC Passeggi},
  year = {1989},
  doi = {10.1103/physrevb.39.2685},
  url = {https://pubmed.ncbi.nlm.nih.gov/9948516/},
  note = {Source identifier: 9948516}
}