@book { RaumschiffRUBIKON3DiePerleChardhin, title = "Raumschiff RUBIKON 3 Die Perle Chardhin", author = "Alfred {Bekker}", year = "2019", publisher = "Uksak E-Books", address = "Lengerich, Deutschland", url = "https://uksakebooks.grin.com/document/452780" }