@book { StandardsoftwarefrdasSupplyChainManagement,
    title = "Standardsoftware für das Supply-Chain-Management",
    author = "Guido {Keimer}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832418366",
    url = "https://m.diplom.de/document/217688"
}