@book { CrossMediaStrategienbeiEinfhrungvonOnlineMarken,
    title = "Cross-Media-Strategien bei Einführung von Online-Marken",
    author = "Daniel {Martens}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832446475",
    url = "https://m.diplom.de/document/220257"
}