Jürgen Dassow, Jozef Kelemen Cooperating/Distributed Grammar Systems: a Link between Formal Languages and Artificial Intelligence. [Citation Graph (0, 0)][DBLP] Bulletin of the EATCS, 1991, v:45, n:, pp:131-145 [Journal]
Gheorghe Paun A Characterization of Recursively Enumerable Languages. [Citation Graph (0, 0)][DBLP] Bulletin of the EATCS, 1991, v:45, n:, pp:218-222 [Journal]
Paavo Turakainen A Unified Approach to Characterizations of Recursively Enumerable Languages. [Citation Graph (0, 0)][DBLP] Bulletin of the EATCS, 1991, v:45, n:, pp:223-228 [Journal]
David Turner Duality and De Morgan Laws for the Algebra of Lists. [Citation Graph (0, 0)][DBLP] Bulletin of the EATCS, 1991, v:45, n:, pp:229-238 [Journal]
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