S
[SU02] Marcus Schaefer et Christopher Umans. Completeness in the Polynomial-Time hierarchy: Part II. SIGACT News 33(4):22-36. ACM Press, décembre 2002. 
@article{sigact-news33(4)-SU,
  author =              {Schaefer, Marcus and Umans, Christopher},
  title =               {Completeness in the Polynomial-Time hierarchy:
                         Part~II},
  publisher =           {ACM Press},
  journal =             {SIGACT News},
  volume =              {33},
  number =              {4},
  pages =               {22-36},
  year =                {2002},
  month =               dec,
}
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