@book { TheEuropeanizationofMigrationPolicy,
    title = "The Europeanization of Migration Policy",
    subtitle = "The Schengen Acquis between the Priorities of Legal Harmonization and Fragmentation",
    author = "Robert {Fischer}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01373-3",
    url = "https://www.peterlang.com/document/1046680"
}