Marcelo Arenas, Jorge Pérez. Querying semantic web data with SPARQL. In Maurizio Lenzerini, Thomas Schwentick, editors, Proceedings of the 30th ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems, PODS 2011, June 12-16, 2011, Athens, Greece. pages 305-316, ACM, 2011. [doi]
Abstract is missing.