1. Berners-Lee, T., Hendler, J., Lassila, O.: The semantic web. Scientific American 284(5), 28–37 (2001)
2. Prud Hommeaux, E., Seaborne, A.: SPARQL query language for RDF. W3C Recommendation 15 (2008)
3. Lecture Notes in Computer Science;P. Hoefler,2013
4. Russell, A., Smart, P.R., Braines, D., Shadbolt, N.R.: NITELIGHT: A Graphical Tool for Semantic Query Construction (2008)
5. Clark, L.: SPARQL Views: A Visual SPARQL Query Builder for Drupal. ISWC Posters & Demos (2010)