@book { DasToyotaProduktionssystem,
    title = "Das Toyota Produktionssystem",
    author = "Stefan {Wissert}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656066064",
    url = "https://www.hausarbeiten.de/document/182643"
}