Foot-and-mouth disease virus populations are quasispecies.

@article{Domingo1992FootandmouthDV,
  title={Foot-and-mouth disease virus populations are quasispecies.},
  author={Esteban Domingo and Cristina Escarm{\'i}s and Miguel {\'A}ngel Mart{\'i}nez and Encarnaci{\'o}n Mart{\'i}nez-Salas and Mauricio G Mateu},
  journal={Current topics in microbiology and immunology},
  year={1992},
  volume={176},
  pages={33-47}
}