@book { GrnderserviceimdeutschsprachigenRaum,
    title = "Gründerservice im deutschsprachigen Raum",
    author = "Stefan {Schatz}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832453725",
    url = "https://m.diplom.de/document/220934"
}