@misc{indiciaea19a1226bc40,
  title = {Natural selection in pathogens.},
  author = {R Levins},
  year = {1994},
  doi = {10.1111/j.1749-6632.1994.tb19876.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7840456/},
  note = {Source identifier: 7840456}
}