@book { UnitedunderSAP,
    title = "United under SAP",
    subtitle = "The process of eliminating information islands for ThyssenKrupp in China (Zhongshan)",
    author = "Marcel {Gundlach}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/226594"
}