@book { StrategischeSponsoringPartnerschaftenimFuballbusiness,
    title = "Strategische (Sponsoring-) Partnerschaften im Fußballbusiness",
    author = "Simon {Groscurth}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832440954",
    url = "https://m.diplom.de/document/219722"
}