On Contextual Grammars with Parallel Derivation

[1]  Gheorghe Paun,et al.  Marcus Contextual Grammars , 1994, Bull. EATCS.

[2]  Solomon Marcus,et al.  Algebraic Linguistics Analytical Models , 1967 .

[3]  Solomon Marcus,et al.  Contextual Grammars , 1969, COLING.