@book { InternationaleDirektinvestitionen,
    title = "Internationale Direktinvestitionen",
    author = "Dirk {Wahrendorf}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832452650",
    url = "https://m.diplom.de/document/220833"
}