@misc{indiciae7b1210d05818,
  title = {Beatty's box.},
  author = {M K H Crumplin and R Pearce},
  year = {2005},
  doi = {10.1136/bmj.331.7531.1531},
  url = {https://pubmed.ncbi.nlm.nih.gov/16373741/},
  note = {Source identifier: 16373741}
}