@book { VergeltungKurzgeschichteKrimi,
    title = "Vergeltung (Kurzgeschichte, Krimi)",
    author = "Rainer {Güllich}",
    year = "2018",
    publisher = "booksnacks",
    address = "Stuttgart, Germany",
    url = "https://shop.digitalpublishers.de/document/435096"
}