@book { TriduumSacrum,
    title = "Triduum Sacrum",
    subtitle = "booksnacks (Kurzgeschichte, Krimi, Humor)",
    author = "Thomas {Kowa}",
    year = "2016",
    publisher = "booksnacks",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/337412"
}