P. Haase, D. Herzig, M. Musen, и T. Tran. The Semantic Web: Research and Applications, 6th European Semantic Web Conference, ESWC 2009, Heraklion, Crete, Greece, том 5554 из Lecture Notes in Computer Science, Springer, Berlin, (2009)
M. Möller, S. Regel, и M. Sintek. The Semantic Web: Research and Applications, 6th European Semantic Web Conference, ESWC 2009, Heraklion, Crete, Greece, том 5554 из Lecture Notes in Computer Science, Springer, Berlin, (2009)