@misc{indiciae9af00d9858ae,
  title = {Occupancy principle: nonidentity with mean transit time.},
  author = {W Perl and F P Chinard},
  year = {1969},
  doi = {10.1126/science.166.3902.260},
  url = {https://pubmed.ncbi.nlm.nih.gov/5809603/},
  note = {Source identifier: 5809603}
}