@book { RisikomanagementbeiDirektinvestitionenindenABCStaaten,
    title = "Risikomanagement bei Direktinvestitionen in den ABC-Staaten",
    author = "Peter {Rupilius}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836636766",
    url = "https://m.diplom.de/document/227256"
}