1. Bernstein, A., Kiefer, C., Stocker, M.,, O.: A sparql optimization approach based on triple pattern selectivity estimation. Technical report, University of Zurich, Department of (2007)
2. Alor-Hernández, G., Gómez Berbís, J.M., Rodríguez González, A., et al.: HYDRA: A Middleware-Oriented Integrated Architecture for e-Procurement in Supply Chains. T. Computational Collective Intelligence 1, 1–20 (2010)
3. Bellaachia, A., Amor-Tijani, G.: Enhanced query expansion in english-arabic clir. In: Proceedings of the 2008 19th International Conference on Database and Expert Systems Application, pp. 61–66. IEEE Computer Society, Washington, DC, USA (2008)
4. Berrueta, D., Labra, J.E., Polo, L.: Searching over Public Administration Legal Documents Using Ontologies. In: JCKBSE, pp. 167–175 (2006)
5. Blanco, R., Bortnikov, E., Junqueira, F., Lempel, R., Telloli, L., Zaragoza, H.: Caching search engine results over incremental indices. In: Proceeding of the 33rd ACM SIGIR 2010 Conference, SIGIR 2010, pp. 82–89. ACM, New York (2010)