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"A General Class of Noncontext Free Grammars Generating Context Free Languages"
Sarwan K. Aggarwal, James A. Heinen (1979)
- Sarwan K. Aggarwal, James A. Heinen:
A General Class of Noncontext Free Grammars Generating Context Free Languages. Inf. Control. 43(2): 187-194 (1979)
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