@book { FroschksschenfrdasBurgfrulein,
    title = "Froschküsschen für das Burgfräulein",
    author = "Ulrike Ina {Schmitz}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/996688"
}