@book { GoingPrivateundwasdann,
    title = "Going Private und was dann?",
    author = "Johannes {Zumpe} and Daniel Sebastian {Wenzel}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832467746",
    url = "https://m.diplom.de/document/222129"
}