@inproceedings{DBLP:conf/semweb/PerezAG06,
  author    = {Jorge Perez and
               Marcelo Arenas and
               Claudio Gutierrez},
  title     = {Semantics and Complexity of SPARQL},
  booktitle = {The Semantic Web - ISWC 2006, 5th International Semantic
               Web Conference, ISWC 2006, Athens, GA, USA, November 5-9,
               2006, Proceedings},
  year      = {2006},
  pages     = {30-43},
  ee        = {http://dx.doi.org/10.1007/11926078_3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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