1. Logical depth and physical complexity;Bennett,1988
2. The random number omega bids fair to hold the mysteries of the universe;Bennett;Scientific Amer.,1979
3. Varieties of Constructive Mathematics;Bridges,1987
4. Information and randomness;Calude,1994
5. Kraft-Chaitin inequality revisited;Calude C. Grozea;J. UCS,1996