@misc{indiciaeb6401abbfde6,
  title = {Variations in ATC-work load as a function of variations in cockpit workload.},
  author = {J P Krol},
  year = {1971},
  doi = {10.1080/00140137108931279},
  url = {https://pubmed.ncbi.nlm.nih.gov/5148235/},
  note = {Source identifier: 5148235}
}