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2. On a decision method in restricted second order arithmetic;Buchi,1960
3. Finite automata on infinite structures;Choueka,1970
4. Theories of automata on ω-tapes: a simplified approach;Choueka;J. Comput. System Sci.,1974
5. Theory of ω-languages; part I: characterizations of ω-context free languages;Cohen;J. Comput. System Sci.,1977