@misc{indiciae1261874f067f,
  title = {A sequential "2-1-3" model of genetic code evolution that explains codon constraints.},
  author = {Steven E Massey},
  year = {2006},
  doi = {10.1007/s00239-005-0222-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16612538/},
  note = {Source identifier: 16612538}
}