@book { Desinvestitionen,
    title = "Desinvestitionen",
    author = "Joachim {Krantz}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832470371",
    url = "https://m.diplom.de/document/222346"
}