@misc{indiciae86b203cd7343,
  title = {Optimal alphabets for an RNA world.},
  author = {Paul P Gardner and Barbara R Holland and Vincent Moulton and Mike Hendy and David Penny},
  year = {2003},
  doi = {10.1098/rspb.2003.2355},
  url = {https://pubmed.ncbi.nlm.nih.gov/12816657/},
  note = {Source identifier: 12816657}
}