@book { MSExcel2000berblickfrAnwender,
    title = "MS Excel 2000 - Überblick für Anwender",
    author = "Olaf {Schulz}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638128537",
    url = "https://www.hausarbeiten.de/document/4657"
}