@book { VerdeckteErmittlungimFKKClub,
    title = "Verdeckte Ermittlung im FKK - Club",
    author = "Hannah {Stollner}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1422485"
}