1. Bloom, S. L. andÉsik, Z.,Matrix and matricial interaction theories, Part I, JCSS,46 (1993), 381?408.
2. Bloom, S. L. andÉsik, Z.,Matrix and matricial interaction theories of regular sets, Stevens Technical Report, December 1990.
3. Bloom, S. L. andÉsik, Z.,Equational axioms for regular sets, Mathematical Structures in Computer Science, 5 (1993), 1?24.
4. Conway, J.,Regular Algebra and Finite Machines, Chapman and Hall, London, 1971.
5. Eilenberg, S.,Automata, Languages and Machines, vol. A, Academic Press, New York 1974.