title: The concept of the quasispecies will soon be 50 years old. Introduction.
authors.forename: Manfred
authors.initials: M
authors.lastname: Eigen
mesh_terms: D001435:Bacteriophages / Q000145:classification / Q000235:genetics*; D044822:Biodiversity; D019143:Evolution, Molecular; D049673:History, 20th Century; D049674:History, 21st Century; D014773:Virology / Q000266:history