@book { DieABCAnalyse,
    title = "Die ABC-Analyse",
    author = "Manuela {Gaigg}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640719433",
    url = "https://www.hausarbeiten.de/document/159447"
}