@book { RealisierungderSEPAmitSAP,
    title = "Realisierung der SEPA mit SAP",
    author = "Sören {Hellfritzsch}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656317470",
    url = "https://www.hausarbeiten.de/document/204726"
}