Akiyoshi Matono Said Mirza Pahlevi Isao Kojima RDFCube: A P2P-Based Three-Dimensional Index for Structural Joins on Distributed Triple Stores. 323-330 2006 conf/dbisp2p/2006 DBISP2P http://dx.doi.org/10.1007/978-3-540-71661-7_31 db/conf/dbisp2p/dbisp2p2006.html#MatonoPK06