@misc{indiciaee47b0a57902b,
  title = {van der Waals interactions between sharp probes and flat sample surfaces.},
  author = {U Hartmann},
  year = {1991},
  doi = {10.1103/physrevb.43.2404},
  url = {https://pubmed.ncbi.nlm.nih.gov/9997520/},
  note = {Source identifier: 9997520}
}