@book { DieRollederFrauwhrendderKreuzzge,
    title = "Die Rolle der Frau während der Kreuzzüge",
    author = "M. R. {Maponos}",
    year = "2021",
    publisher = "Historia H.M. Verlag",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/991077"
}