@book { CocaColaZeroEchterGeschmackZeroZucker,
    title = "Coca-Cola Zero: Echter Geschmack - Zero Zucker",
    author = "Julia {Sonntag} and Sönke {Thiel} and Alexander {Braun}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842829992",
    url = "https://m.diplom.de/document/229200"
}