@article{RutschkeNaacke1995,
  author    = {Rutschke, Erich and Naacke, Johannes},
  title     = {Zur Situation der Wildg{\"a}nse in Ostdeutschland : Bestandsentwicklung seit 1990 ; Bestand 1994/95 ; Probleme.},
  year      = {1995},
  language  = {de}
}
@article{Naacke1995,
  author    = {Naacke, Johannes},
  title     = {Markierungsprogramme f{\"u}r G{\"a}nse in Europa},
  year      = {1995},
  language  = {de}
}