@book { FinanzierungvonPublicPrivatePartnershipProjekten,
    title = "Finanzierung von Public Private Partnership Projekten",
    author = "Christian {Borusiak}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836604338",
    url = "https://m.diplom.de/document/228945"
}