@article{PrengelLiebers2004,
  author    = {Prengel, Annedore and Liebers, Katrin},
  title     = {Leitideen f{\"u}r Lernstandsanalysen am Schulanfang},
  isbn      = {3000163395},
  year      = {2004},
  language  = {de}
}
@article{KnaufLiebersPrengel2005,
  author    = {Knauf, Anne and Liebers, Katrin and Prengel, Annedore},
  title     = {Einleitung},
  isbn      = {3-7815-1398-x},
  year      = {2005},
  language  = {de}
}
@article{LiebersPrengelBieber2008,
  author    = {Liebers, Katrin and Prengel, Annedore and Bieber, G{\"o}tz},
  title     = {Einleitung},
  isbn      = {978-3-407-32090-2},
  year      = {2008},
  language  = {de}
}