1. NASA: Dark Energy, Dark Matter (April 2012)http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/
2. It from Bit, at Home in the Universe;Wheeler,1994
3. Information: The New Language of Science;Baeyer,2004
4. Programming the Universe;Lloyd,2006
5. Decoding the Universe;Seife,2007