@book { ErnhrungbeiEisenmangel,
    title = "Ernährung bei Eisenmangel",
    author = "Ilse {Weiß} and Christoph {Gasche}",
    year = "2019",
    publisher = "facultas / maudrich",
    address = "Wien, Austria",
    url = "https://campus-lizenzen.facultas.at/document/520708"
}