@misc{indiciaead1a3f9c162e,
  title = {A simple constant-force pocket probe.},
  author = {P C Borsboom and J J ten Bosch and N H Corba and J A Tromp},
  year = {1981},
  doi = {10.1902/jop.1981.52.7.390},
  url = {https://pubmed.ncbi.nlm.nih.gov/6942156/},
  note = {Source identifier: 6942156}
}