@book { ErnhrungbeiPCOS,
    title = "Ernährung bei PCOS",
    subtitle = "Polyzystisches Ovarsyndrom",
    author = "Peter {Frigo} and Rhea {Jabbour} and Christoph {Deutsch}",
    year = "2021",
    publisher = "facultas / maudrich",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/1009666"
}