@book { DasKeyUniversityManagement,
    title = "Das Key-University-Management",
    author = "Wolfgang {Glaser}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832456122",
    url = "https://m.diplom.de/document/221094"
}