@misc{indiciaeefe92c769506,
  title = {Surface phonons localized at step edges.},
  author = {P Knipp},
  year = {1989},
  doi = {10.1103/physrevb.40.7993},
  url = {https://pubmed.ncbi.nlm.nih.gov/9991235/},
  note = {Source identifier: 9991235}
}