@misc{indiciaead9d14f46399,
  title = {Two SIS epidemiologic models with delays.},
  author = {H W Hethcote and P van den Driessche},
  year = {2000},
  doi = {10.1007/s002850050003},
  url = {https://pubmed.ncbi.nlm.nih.gov/10663661/},
  note = {Source identifier: 10663661}
}