@book{BergstedtGroenkeMeincke1996,
  author    = {Bergstedt, Christel and Gr{\"o}nke, Ottokar and Meincke, Irmtraut},
  title     = {Biologie : Lehrbuch f{\"u}r Sekundarstufe II ; Gymnasium, Gesamtschule ; Lehrerband mit Kopiervorlagen},
  publisher = {Volk u. Wissen},
  address   = {Berlin},
  isbn      = {3-06-012155-9},
  pages     = {160 S.},
  year      = {1996},
  language  = {de}
}
@article{BergstedtHornMichelskisetal.2001,
  author    = {Bergstedt, Christel and Horn, Martin Erik and Michelskis, Helmut and Winter, Rolf},
  title     = {Energie},
  series = {Naturwissenschaften : Biologie, Chemie, Physik},
  volume    = {8},
  journal   = {Naturwissenschaften : Biologie, Chemie, Physik},
  publisher = {Volk-und-Wissen-Verl.},
  address   = {Berlin},
  isbn      = {3-06-020935-9},
  pages     = {64 S.},
  year      = {2001},
  language  = {de}
}
@book{DietrichLiebersBergstedt2000,
  author    = {Dietrich, Volkmar and Liebers, Klaus and Bergstedt, Christel},
  title     = {Naturwissenschaften : Biologie, Chemie, Physik : Bd. 2 Vom Waschen},
  editor    = {Dietrich, Volkmar and Bergstedt, Christel and Liebers, Klaus},
  publisher = {Cornelsen},
  address   = {Berlin},
  isbn      = {3-06-030740-7},
  pages     = {64 S.},
  year      = {2000},
  language  = {de}
}
@book{DietrichLiebersBergstedt1998,
  author    = {Dietrich, Volkmar and Liebers, Klaus and Bergstedt, Christel},
  title     = {Naturwissenschaften : Biologie, Chemie, Physik : Bd. 3 Boden},
  editor    = {Dietrich, Volkmar},
  publisher = {Volk-und-Wissen-Verl.},
  address   = {Berlin},
  isbn      = {3-464-85176-1},
  pages     = {64 S.},
  year      = {1998},
  language  = {de}
}
@article{Bergstedt1999,
  author    = {Bergstedt, Christel},
  title     = {Zur Erarbeitung von Aufgabenstellungen im Fach Biologie auf der Grundlage des Rahmenplans},
  year      = {1999},
  language  = {de}
}