@misc{indiciaece9f32706803,
  title = {A simple vaccination model with multiple endemic states.},
  author = {C M Kribs-Zaleta and J X Velasco-Hernández},
  year = {2000},
  doi = {10.1016/s0025-5564(00)00003-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/10748286/},
  note = {Source identifier: 10748286}
}