@misc{indiciae918bab6f7b90,
  title = {Modality, difficulty, and "coupling" in vigilance behavior.},
  author = {M Loeb and J R Binford},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5142063/},
  note = {Source identifier: 5142063}
}