@book { LeanManagementundPersonalfhrung,
    title = "Lean Management und Personalführung",
    author = "Jutta {Schmätjen}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832412548",
    url = "https://m.diplom.de/document/217168"
}