1. Theories of Abstract Automata;Arbib,1969
2. Self-reproduction in small cellular automata;Byl;Physica D,1989
3. Cellular Automata;Codd,1968
4. Biological and nanomechanical systems: Contrasts in evolutionary capacity;Drexler,1989
5. Nanosystems: Molecular Machinery, Manufacturing and Computation;Drexler,1992