@misc{indiciaeb184a275e6bb,
  title = {Has the message been received and understood?},
  author = {K R Cripwell},
  year = {1983},
  doi = {10.1016/0035-9203(83)90137-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/6636286/},
  note = {Source identifier: 6636286}
}