@misc{indiciae0509d471f4e4,
  title = {Three stages in the evolution of the genetic code.},
  author = {U Baumann and J Oro},
  year = {1993},
  doi = {10.1016/0303-2647(93)90089-u},
  url = {https://pubmed.ncbi.nlm.nih.gov/8374065/},
  note = {Source identifier: 8374065}
}