@misc{indiciaeb851cd8d06fb,
  title = {Causality inference in observational vs. experimental studies. An empirical comparison.},
  author = {K Gray-Donald and M S Kramer},
  year = {1988},
  doi = {10.1093/oxfordjournals.aje.a114891},
  url = {https://pubmed.ncbi.nlm.nih.gov/3282432/},
  note = {Source identifier: 3282432}
}