@misc{indiciae69afaa190a3f,
  title = {Payment by colour.},
  author = {S Dowling},
  year = {1972},
  doi = {10.1136/bmj.1.5801.689-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/5015310/},
  note = {Source identifier: 5015310}
}