1. Transductions and Context-Free Languages;Berstel,1979
2. Monadic Thue systems;Book;Theoret. Comput. Sci.,1982
3. String-Rewriting Systems;Book,1993
4. Regular canonical systems;Büchi;Arch. Math. Logik Grundlagenforschung,1964
5. Finite Automata, Their Algebras and Grammars—Towards a Theory of Formal Expressions;Büchi,1989