@misc{indiciae971d43a33055,
  title = {Polite responses to polite requests.},
  author = {H H Clark and D H Schunk},
  year = {1980},
  doi = {10.1016/0010-0277(80)90009-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/7389285/},
  note = {Source identifier: 7389285}
}