@book { ProjektcontrollingmitSAPERP,
    title = "Projektcontrolling mit SAP ERP",
    author = "Martin {Stroh} and Nina {Böhme} and Sibel {Özbay} and Christina {Wagner}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656272120",
    url = "https://www.hausarbeiten.de/document/200342"
}