@misc{indiciaef40b8c0b1360,
  title = {Abstract biological systems as sequential machines. 3. Some algebraic aspects.},
  author = {R Rosen},
  year = {1966},
  doi = {10.1007/bf02476987},
  url = {https://pubmed.ncbi.nlm.nih.gov/5963147/},
  note = {Source identifier: 5963147}
}