@book { BeziehungsmanagementimSportsponsoring,
    title = "Beziehungsmanagement im Sportsponsoring?",
    author = "Thorben {Meier} and Sascha {Bembennek}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832477318",
    url = "https://m.diplom.de/document/222791"
}