@book { DieMarschlandMordeKstenkrimi,
    title = "Die Marschland-Morde: Küstenkrimi",
    author = "Lars {Olsen}",
    year = "2021",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1161672"
}