@book { ImplicitCommunicationandMarketing,
    title = "Implicit Communication and Marketing",
    author = "Carsten {Teubel}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836630160",
    url = "https://m.diplom.de/document/226824"
}