@book { LeanManagement,
    title = "Lean Management",
    author = "Nesrin {Uzunali}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640054503",
    url = "https://www.hausarbeiten.de/document/107176"
}