@book { DieUkraineunddieEuropischeUnion,
    title = "Die Ukraine und die Europäische Union",
    author = "Oksana {Czarny}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/226998"
}