@misc{indiciae80b00f20b07a,
  title = {Phonons on stepped surfaces.},
  author = {P Knipp},
  year = {1991},
  doi = {10.1103/physrevb.43.6908},
  url = {https://pubmed.ncbi.nlm.nih.gov/9998153/},
  note = {Source identifier: 9998153}
}