@book { Improvingsupplychainperformancethroughanintegratedplanningconcept,
    title = "Improving supply chain performance through an integrated planning concept",
    author = "Hermann {Kraxenberger}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836607698",
    url = "https://m.diplom.de/document/225474"
}