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"The generative power of multiple context-free grammars and head grammars."
Takashi Matsumura et al. (1991)
- Takashi Matsumura, Hiroyuki Seki, Mamoru Fujii, Tadao Kasami:
The generative power of multiple context-free grammars and head grammars. Syst. Comput. Jpn. 22(4): 41-56 (1991)
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