@book { DergeheimnisvolleSchlsselEinCthulhuRoman,
    title = "Der geheimnisvolle Schlüssel: Ein Cthulhu-Roman",
    author = "Hubert {Hug}",
    year = "2019",
    publisher = "Uksak E-Books",
    address = "Lengerich, Germany",
    url = "https://uksakebooks.grin.com/document/453492"
}