@misc{indiciae50ee734fcb51,
  title = {Tautologies in epidemic models.},
  author = {P R Sheehe and H A Feldman},
  year = {1979},
  doi = {10.1093/infdis/139.5.618a},
  url = {https://pubmed.ncbi.nlm.nih.gov/438554/},
  note = {Source identifier: 438554}
}