@misc{indiciae039b17e19bd6,
  title = {Evidence that two present-day components needed for the genetic code appeared after nucleated cells separated from eubacteria.},
  author = {L Ribas de Pouplana and M Frugier and C L Quinn and P Schimmel},
  year = {1996},
  doi = {10.1073/pnas.93.1.166},
  url = {https://pubmed.ncbi.nlm.nih.gov/8552597/},
  note = {Source identifier: 8552597}
}