@misc{indiciae22d96fcc20de,
  title = {Surface states in doped polymers.},
  author = {C Yu and DL Lin and X Sun},
  year = {1994},
  doi = {10.1103/physrevb.50.17120},
  url = {https://pubmed.ncbi.nlm.nih.gov/9976111/},
  note = {Source identifier: 9976111}
}