@book { RaumschiffRubikon42DieMachtderFraktalen, title = "Raumschiff Rubikon 42 Die Macht der Fraktalen", author = "Manfred {Weinland}", year = "2018", publisher = "Uksak E-Books", address = "Lengerich, Deutschland", url = "https://uksakebooks.grin.com/document/453198" }