For further reading ...

• Abbott, Edwin A. Flatland, A Romance of Many Dimensions Dover, New York 1952

• Dalrymple-Henderson, Linda The Fourth Dimension and Non-Euclidean Geometry in Modern Art Princeton University Press 1983

• Emmer, Michele (editor) The Visual Mind, Art and Mathematics MIT Press, Cambridge MA 1993

• Peterson, Ivars The Mathematical Tourist, Snapshots of Modern Mathematics W. H. Freeman & Co., New York 1988