References
- D. Dunham, M.C. Escher’s use of the Poincaré models of hyperbolic geometry, Mathematics and Modern Art, pp. 69–77, Springer Proceedings (2012).
- First-hand: Early digital art at Bell telephone laboratories, Inc (2014). Available at http://www.ieeeghn.org.
- H.A. Lorentz, ‘Space And Time’, a translation of an address delivered by H. Minkowski at the 80th assembly of German natural scientists and physicians, at Cologne, 21 Sep 1908, in The Principle of Relativity: A 335 Collection of Original Memoirs on the Special and General Theory of Relativity, Dover Publishing, New York, 1952. .