@misc{indiciaec0f74f8f6733,
  title = {Performance changes during the sustained operation of a complex psychomotor task.},
  author = {V S Ellingstad and N W Heimstra},
  year = {1970},
  doi = {10.1080/00140137008931195},
  url = {https://pubmed.ncbi.nlm.nih.gov/5532301/},
  note = {Source identifier: 5532301}
}