@book { Managementttigkeiten,
    title = "Managementtätigkeiten",
    subtitle = "Ergebnisse empirischer Managementforschung",
    author = "Kirstin {Schulte}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832437404",
    url = "https://m.diplom.de/document/219424"
}