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Chains of full AFL’s. (English) Zbl 0203.30102

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[1] A. V. Aho, Indexed grammars–an extension of context free grammars,J. Assoc. Comput. Mach. 15 (1968), 647–671. · Zbl 0175.27801
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[4] S. Ginsburg andS. Greibach, Principal AFL, SDC Document No. TM-738/051/01, 1969,J. Comput. System Sci., to appear.
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[14] M. Schkolnick, Two-type bracked grammars,IEEE Ninth Annual Symposium on Switching and Automata Theory, October 1968, pp. 315–326.
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