@book { DerschwarzeBallonEinFallfrWandaMallory1,
    title = "Der schwarze Ballon: Ein Fall für Wanda Mallory 1",
    author = "Valerie {Frankel} and Joachim {Pente}",
    year = "2022",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/1023412"
}