@book { ErnhrungbeiGastritis,
    title = "Ernährung bei Gastritis",
    author = "Flora {Koller} and Daniela {Riedl} and Roswitha {Scholler}",
    year = "2023",
    publisher = "facultas / maudrich",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/1288055"
}