J. Trinkunas, und O. Vasilecas. CompSysTech '07: Proceedings of the 2007 international conference on Computer systems and technologies, Seite 1--6. New York, NY, USA, ACM, (2007)
W. Hu, und Y. Qu. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, Volume 4825 von LNCS, Seite 225--238. Berlin, Heidelberg, Springer Verlag, (November 2007)