@book { DieEuropischeIntegrationEineCleavage,
    title = "Die Europäische Integration. Eine Cleavage?",
    author = "Lucas {Gerrits}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656568124",
    url = "https://www.hausarbeiten.de/document/266952"
}