@book { PoliticalDeterminantsofEvolutionandReformoftheGermanPublicPensionPlan,
    title = "Political Determinants of Evolution and Reform of the German Public Pension Plan",
    author = "Nicole {Petrick}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638741446",
    url = "https://www.hausarbeiten.de/document/73650"
}