@misc{indiciaeac6dcd9367e2,
  title = {The human operator in air traffic control systems.},
  author = {J H Kirchner and W Laurig},
  year = {1971},
  doi = {10.1080/00140137108931274},
  url = {https://pubmed.ncbi.nlm.nih.gov/5148230/},
  note = {Source identifier: 5148230}
}