@book { ZumWandeldesHooliganismusimSport,
    title = "Zum Wandel des Hooliganismus im Sport",
    author = "Max {Maihorn}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/226075"
}