S. Ferré, Conceptual navigation in RDF graphs with SPARQL-like queries, Int. Conf. Formal Concept Analysis, vol.5986, pp.193-208, 2010.

S. Ferré, Sparklis: An expressive query builder for SPARQL endpoints with guidance in natural language, Semantic Web: Interoperability, Usability, Applicability, vol.8, issue.3, pp.405-418, 2017.

D. Hernández, A. Hogan, and M. Krötzsch, Reifying RDF: What works well with wikidata, Int. Work. Scalable Semantic Web Knowledge Base Systems, vol.1457, pp.32-47, 2015.

G. Marchionini, Exploratory search: from finding to understanding, Communications of the ACM, vol.49, issue.4, pp.41-46, 2006.

L. Rietveld and R. Hoekstra, YASGUI: Not just another SPARQL client, The Semantic Web: ESWC 2013 Satellite Events, pp.78-86, 2013.