@book { OnlinePanelsStatusquoundEntwicklungsperspektiven,
    title = "Online Panels: Status quo und Entwicklungsperspektiven",
    author = "Sebastian {Woerle}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832456474",
    url = "https://m.diplom.de/document/221127"
}