1. Algebra automata I: Parallel programming as a prolegomena to the categorical approach;Arbib;Inform. Control,1968
2. Automata in General Algebras;Eilenberg;Inform. Control,1967
3. Functional semantics of algebraic theories;Lawvere,1963
4. Algebraic Theory of Machines, Languages and Semigroups,1968
5. On some properties of the free monoids with applications to automata theory;Give'on;J. Comp. Syst. Theory,1967