@book { DieEUinderKrise,
    title = "Die EU in der Krise",
    author = "Rene {Kohlweiss}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656237594",
    url = "https://www.hausarbeiten.de/document/197579"
}