@book { DerEUSondergipfelam89Mai2010,
    title = "Der EU-Sondergipfel am 8./9. Mai 2010",
    author = "Ramazan {Topal}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656001492",
    url = "https://www.hausarbeiten.de/document/178218"
}