@misc{indiciaee9ee57026e95,
  title = {'Oxide-free' tip for scanning tunneling microscopy},
  author = {Colton, R. J. and Baker, S. M. and Baldeschwieler, J. D. and Kaiser, W. J.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870062764},
  note = {Source identifier: 19870062764}
}