1. The complexity of theorem-proving procedures;Cook,1971
2. Computers and Intractability: A Guide to the Theory of NP-completeness;Garey,1979
3. Succinct representations of graphs;Galperin;Inform. Control.,1983
4. Sparse sets in NP: EXPTIME vs NEXPTIME;Hartmanis,1983
5. The circuit value problem is log space complete for P;Ladner;SIGACT News,1975