@book { KonditionengestaltunginFranchiseorganisationen,
    title = "Konditionengestaltung in Franchiseorganisationen",
    author = "Jochen {Köstner}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832471828",
    url = "https://m.diplom.de/document/222487"
}