@book { FunktionelleLebensmittelfrBestAger,
    title = "Funktionelle Lebensmittel für Best Ager",
    author = "Sandra {Maier}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842806641",
    url = "https://m.diplom.de/document/228141"
}