1. Finite power property of regular languages;Linna,1973
2. The FPP-problem for regular languages;Linna;Bull. EATCS,1978
3. Limited subsets of a free monoid;Simon,1978
4. A decision procedure for the order of regular events;Hashiguchi;Theoret. Comput. Sci.,1979
5. Counter-Free Automata;McNaughton,1971