By Donini F.M.   Lenzerini M.   Nardi D.   Nutt W.   in Information and Computation

ISSN:0890-5401|134|1|1-58

Academic Press‎(1997)‎

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By Cadoli M.   Donini F.M.   Liberatore P.   Schaerf M.   in Information and Computation

ISSN:0890-5401|176|2|89-120

Academic Press‎(2002)‎

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By Cadoli M.   Donini F.M.   Schaerf M.   Silvestri R.   in Theoretical Computer Science

ISSN:0304-3975|182|1|183-202

Elsevier‎(1997)‎

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