@misc{indiciaec2617aa1eab7,
  title = {Gene duplication in experimental enzyme evolution.},
  author = {P W Rigby and B D Burleigh and B S Hartley},
  year = {1974},
  doi = {10.1038/251200a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4417076/},
  note = {Source identifier: 4417076}
}