@phdthesis{Kropf2007,
  author      = {Heike Kropf},
  title       = {Epidemiologie von Echoviren und Polioviren},
  type        = {doctoralthesis},
  pages       = {80},
  school      = {Universit{\"a}tsbibliothek Johann Christian Senckenberg},
  year        = {2007},
}