@book { DievirtuelleOrganisation,
    title = "Die virtuelle Organisation",
    author = "Thomas {Müller}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832404208",
    url = "https://m.diplom.de/document/216394"
}