@phdthesis{Schaefer2005,
  author      = {Arne Sch{\"a}fer},
  title       = {Characterization of ammoniumtransporters in Arabidopsis thaliana},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Potsdam},
  year        = {2005},
}