@book { DasWebsurfenundderDatenschutz,
    title = "Das «Websurfen» und der Datenschutz",
    author = "Sylke {Wagner}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101421"
}