@misc{indiciae2ca024745bcf,
  title = {Enigma variations.},
  author = {H R MacDonald},
  year = {1992},
  doi = {10.1016/0960-9822(92)90119-u},
  url = {https://pubmed.ncbi.nlm.nih.gov/15336018/},
  note = {Source identifier: 15336018}
}