1. Remarques sur les langages de parentheses;Autebert;Theoret. Comput. Sci.,1984
2. Langages de parentheses, langages N.T.S. et morphismes inverses;Autebert;RAIRO Inform. Theor.,1984
3. On formal properties of simple phrase structure grammars;Bar-Hillel;Z. Phonet. Sprachwissensch. Kommun.,1961
4. Finite complete rewriting systems and the complexity of the word problem;Bauer;Acta Inform.,1984
5. An improvement on Valiant's decision procedure for equivalence of deterministic pushdown automata;Beeri;Theoret. Comput. Sci.,1976