@misc{indiciaec1e2bb4b8c09,
  title = {Atomic-force microscopy on the Si(111)7 x 7 surface.},
  author = {L Howald and R Lüthi and E Meyer and H Güntherodt},
  year = {1995},
  doi = {10.1103/physrevb.51.5484},
  url = {https://pubmed.ncbi.nlm.nih.gov/9979438/},
  note = {Source identifier: 9979438}
}