By Nestmann U.   in Electronic Notes in Theoretical Computer Science

ISSN:1571-0661|16|2|1-8

Elsevier‎(2004)‎

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By Nestmann U.   Pierce B.C.   in Information and Computation

ISSN:0890-5401|163|1|1-59

Academic Press‎(2000)‎

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By Merro M.   Kleist J.   Nestmann U.   in Information and Computation

ISSN:0890-5401|177|2|195-241

Academic Press‎(2002)‎

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By Nestmann U.   Hüttel H.   Kleist J.   Merro M.   in Information and Computation

ISSN:0890-5401|175|1|3-33

Academic Press‎(2002)‎

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