@book { DieFrauimblauenKostm,
    title = "Die Frau im blauen Kostüm",
    author = "Helga {Beyersdörfer}",
    year = "2023",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/1149652"
}