@book { ErnhrungbeiGallensteinen,
    title = "Ernährung bei Gallensteinen",
    author = "Klaus {Nigl} and Peter {Hillebrand}",
    year = "2024",
    publisher = "facultas / maudrich",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/1489742"
}