@book { Focusingonpremiumbrands,
    title = "Focusing on premium brands",
    author = "Johannes-Cornelius {Adari} and Henrik {Thrane} and Pascale {Taube}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832481933",
    url = "https://m.diplom.de/document/223414"
}