@article{WeberSteinGronau2009,
  author    = {Weber, Edzard and Stein, Maureen and Gronau, Norbert},
  title     = {Demokratieorientierte eGovernment-Systeme},
  isbn      = {978-3-89864- 590-4},
  year      = {2009},
  language  = {de}
}
@article{GronauSielaffRoechertVoigtetal.2009,
  author    = {Gronau, Norbert and Sielaff, S and R{\"o}chert-Voigt, Tanja and Stein, Maureen and Weber, Edzard},
  title     = {Change capability of protection systems},
  isbn      = {978-1-8456-4202-0},
  year      = {2009},
  language  = {en}
}
@article{WeberSteinGronau2009,
  author    = {Weber, Edzard and Stein, Maureen and Gronau, Norbert},
  title     = {Demokratieorientierte eGovernment-Systeme},
  issn      = {1436 - 3011},
  year      = {2009},
  language  = {de}
}