@book { VeruerungvonPatenten,
    title = "Veräußerung von Patenten",
    author = "Christine {Beyer}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836609227",
    url = "https://m.diplom.de/document/225557"
}