@book { DasPlanetenNetz15SpurimWeltraum, title = "Das Planeten-Netz 15: Spur im Weltraum", author = "Wilfried A. {Hary}", year = "2020", publisher = "Uksak E-Books", address = "Lengerich, Deutschland", url = "https://uksakebooks.grin.com/document/538945" }