1. Theory of Self-reproducing Automata (Ed. ), University of Illinois Press, Urbana, 1966.
2. Cellular Automata, Academic Press, New York, 1968.
3. ‘The abstract theory of self-reproduction’, in Views on General Systems Theory (Ed. ), Wiley, New York, 1964, Chap. 7.
4. Self-Reproducing Machines
5. and , The SNOBOL 4 Programming Language, Prentice-Hall, Englewood Cliffs, N.J., 1968.