S. Auer, C. Bizer, G. Kobilarov, J. Lehmann, R. Cyganiak, and Z. Ives. Proceedings of the 6th International Semantic Web Conference (ISWC), volume 4825 of Lecture Notes in Computer Science, page 722--735. Springer, (2008)
P. Heim, S. Hellmann, J. Lehmann, S. Lohmann, and T. Stegemann. Proceedings of the 3rd International Conference on Semantic and Media Technologies (SAMT), volume 5887 of Lecture Notes in Computer Science, page 182-187. Springer, (2009)
S. Auer, C. Bizer, G. Kobilarov, J. Lehmann, R. Cyganiak, and Z. Ives. Proceedings of the 6th International Semantic Web Conference (ISWC), volume 4825 of Lecture Notes in Computer Science, page 722--735. Springer, (2008)