@phdthesis{Quack2004,
  author      = {Markus Quack},
  title       = {Molekulargenetische Untersuchungen zur Variabilit{\"a}t der Fichte (Picea abies [L.] Karst.) in Deutschland},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Trier},
  doi       = {10.25353/ubtr-xxxx-8a0e-6bf2},
  year        = {2004},
}