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- [21] SOME CLASSIFICATIONS OF CONTEXT-FREE LANGUAGES INFORMATION AND CONTROL, 1969, 14 (02): : 152 - &
- [23] Strongly Regular Grammars and Regular Approximation of Context-Free Languages DEVELOPMENTS IN LANGUAGE THEORY, PROCEEDINGS, 2009, 5583 : 207 - 220
- [24] LEFT UNIVERSAL CONTEXT-FREE GRAMMARS AND HOMOMORPHIC CHARACTERIZATIONS OF LANGUAGES INFORMATION AND CONTROL, 1981, 50 (02): : 110 - 118
- [27] SOME INHERENTLY AMBIGUOUS CONTEXT-FREE LANGUAGES INFORMATION AND CONTROL, 1971, 18 (04): : 355 - &
- [29] REDUCTION OF CONTEXT-FREE GRAMMARS ELECTRONICS & COMMUNICATIONS IN JAPAN, 1969, 52 (12): : 204 - +
- [30] ENTROPY OF LANGUAGES GENERATED BY AUTOMATION OR CONTEXT-FREE GRAMMARS WITH UNAMBIGUOUS OUTPUT NAUCHNO-TEKHNICHESKAYA INFORMATSIYA SERIYA 2-INFORMATSIONNYE PROTSESSY I SISTEMY, 1968, (01): : 29 - &