@misc{indiciae947d00cd543c,
  title = {Dealing with extracontractual referrals.},
  author = {J D Williamson},
  year = {1991},
  doi = {10.1136/bmj.303.6801.499},
  url = {https://pubmed.ncbi.nlm.nih.gov/1912860/},
  note = {Source identifier: 1912860}
}