@misc{indiciaee537888c5819,
  title = {Loop systems--a contemporary reassessment.},
  author = {M R Sims},
  year = {1972},
  doi = {10.1016/0002-9416(72)90078-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4501184/},
  note = {Source identifier: 4501184}
}