@book { SupplyChainManagement,
    title = "Supply Chain Management",
    author = "Michael {Eßig} and Erik {Hofmann} and Wolfgang {Stölzle}",
    year = "2013",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1220907"
}