@book { DieRolledesKonsumentenbeiderDiffusionvonInnovationen,
    title = "Die Rolle des Konsumenten bei der Diffusion von Innovationen",
    author = "Max {Hollai}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836639545",
    url = "https://m.diplom.de/document/227431"
}