@book { Neuromarketing,
    title = "Neuromarketing",
    author = "Ralf {Zimmermann}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832491239",
    url = "https://m.diplom.de/document/223892"
}