@book { ThinkTanksinBritainandhowtheyinfluenceBritishPolicyonEurope,
    title = "Think Tanks in Britain and how they influence British Policy on Europe",
    author = "Matthias {Giepen}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640160709",
    url = "https://www.hausarbeiten.de/document/114929"
}