@misc{indiciaefcc8eb3a6b57,
  title = {Language of certainty.},
  author = {R Kidd},
  year = {1987},
  doi = {10.2214/ajr.148.3.650},
  url = {https://pubmed.ncbi.nlm.nih.gov/3492901/},
  note = {Source identifier: 3492901}
}