@book { 99TierischeVierzeilerillustriert,
    title = "99 Tierische Vierzeiler - illustriert",
    author = "Friedhelm {Fiebig} and Susanne {Bahr}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1390965"
}