@book { SeinschwersterFall,
    title = "Sein schwerster Fall",
    author = "Freeman Wills {Crofts} and Frieda {Sieg} and Frieda {Sieg}",
    year = "2024",
    publisher = "KI Classics",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1483953"
}