@book { JanKrmerErmittlerinOstfrieslandDieFlle911,
    title = "Jan Krömer - Ermittler in Ostfriesland - Die Fälle 9 - 11",
    author = "Moa {Graven}",
    year = "2019",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1027282"
}