@book { DieMordsfrau,
    title = "Die Mordsfrau!",
    subtitle = "Privatdetektivin & Putzfrau Karo ermittelt",
    author = "Gesine {Schulz}",
    year = "2019",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/453945"
}