@misc{indiciae2f41152194ec,
  title = {A progression puzzle.},
  author = {René Bernards and Robert A Weinberg},
  year = {2002},
  doi = {10.1038/418823a},
  url = {https://pubmed.ncbi.nlm.nih.gov/12192390/},
  note = {Source identifier: 12192390}
}