@book { QMSystemeimKrankenhaus,
    title = "QM-Systeme im Krankenhaus",
    author = "Marcus {Bornhöft}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832483340",
    url = "https://m.diplom.de/document/223527"
}