@misc{indiciae6dcc039d8264,
  title = {Professional courtesy.},
  author = {G Perks},
  year = {1987},
  doi = {10.5694/j.1326-5377.1981.tb135938.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3657688/},
  note = {Source identifier: 3657688}
}