@book { TheEuropeanUnionIsEuropeasuperpowerWillEuropeeverbeasuperpower,
    title = "The European Union: Is Europe a superpower? Will Europe ever be a superpower?",
    author = "Hendrik {Hillebrand}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640852123",
    url = "https://www.hausarbeiten.de/document/168240"
}