@book { RaumschiffRubikon11DersteinerneHimmel,
    title = "Raumschiff Rubikon 11 Der steinerne Himmel",
    author = "Marc {Tannous}",
    year = "2018",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/453134"
}