1. The Theory of Self–Replicating Automata;von Neumann,1966
2. A Collection of Mathematical Problems;Ulam,1960
3. Theory of cellular automata: a survey;Kari;Theoretical Computer Science,2005
4. A New Kind of Science;Wolfram,2002
5. Dynamical properties of expansive one-sided cellular automata;Blanchard;Israel Journal of Mathematics,1997