@phdthesis{Ziegler2003,
  author      = {Christian G. Ziegler},
  title       = {Die B-Chromosomen der Ukelei (Alburnus alburnus)},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year        = {2003},
}