@book { GeschftsberichterstattungimInternet,
    title = "Geschäftsberichterstattung im Internet",
    author = "Matthias {Schulz}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832410377",
    url = "https://m.diplom.de/document/216929"
}