@book { EngelmacherCoEinFallfrKatharinaLedermacher,
    title = "Engelmacher & Co. – Ein Fall für Katharina Ledermacher",
    author = "Richard {Hey}",
    year = "2023",
    publisher = "Bärenklau Exklusiv",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1337570"
}