@misc{indiciaee7306551c9fe,
  title = {Automatic sighing-device.},
  author = {H Feychting and G Settergren},
  year = {1966},
  doi = {10.1016/s0140-6736(66)90010-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4159159/},
  note = {Source identifier: 4159159}
}