1. Bergman, M.: Deconstructing the Google Knowledge Graph.
http://www.mkbergman.com/1009/deconstructing-the-google-knowledge-graph
2. Lecture Notes in Computer Science;E Pietriga,2006
3. Shneiderman, B.: The eyes have it: a task by data type taxonomy for information visualizations. In: IEEE Symposium on Visual Languages, pp. 336–343 (1996)
4. Steiner, T., Mirea, S.: SEKI@home or crowdsourcing an open knowledge graph. In: 1st International Workshop on Knowledge Extraction and Consolidation from Social Media (KECSM’12), Boston, USA (2012)