@misc{indiciaed890974be08c,
  title = {Stability in cyclic epidemic models.},
  author = {M G Roberts},
  year = {1985},
  doi = {10.1007/bf00276488},
  url = {https://pubmed.ncbi.nlm.nih.gov/4067441/},
  note = {Source identifier: 4067441}
}