@book { IchHelenavonTroja,
    title = "Ich, Helena von Troja",
    subtitle = "Roman",
    author = "Margaret {George} and Rainer {Schmidt}",
    year = "2023",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/1160734"
}