@book { IdentittalsMigrationsgrundlage,
    title = "Identität als Migrationsgrundlage",
    author = "Kristin {Vardi}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656543961",
    url = "https://www.hausarbeiten.de/document/264881"
}