@book { EuropeanIdentityandEMU,
    title = "European Identity and EMU",
    author = "Esther {Kemmer}",
    year = "2005",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638368858",
    url = "https://www.hausarbeiten.de/document/37591"
}