@book { TrendsimErnhrungsverhalteninBayern,
    title = "Trends im Ernährungsverhalten in Bayern",
    author = "Leila {Lettovics}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/225217"
}