@book { RobertSField01DasharteGesetz,
    title = "Robert S. Field 01: Das harte Gesetz",
    author = "Robert S. {Field}",
    year = "2021",
    publisher = "Blitz-Verlag",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1023957"
}