X. Wang, D. Zhang, T. Gu, and H. Pung. Pervasive Computing and Communications Workshops, 2004. Proceedings
of the Second IEEE Annual Conference on, page 18- 22. (March 2004)
K. Anyanwu, and A. Sheth. Proceedings of the 12th international conference on World Wide Web, page 690 - 699. Budapest, Hungary, ACM Press New York, NY, USA, (2003)
R. Angles, and C. Gutierrez. 2nd European Semantic Web Conference (ESWC2005), volume 3532/2005 of Lecture Notes in Computer Science, page 346-360. Heraklion, Greece, (May 2005)
I. Millard, D. Roure, and N. Shadbolt. Proceedings of First International Workshop on Advanced Context Modelling,
Reasoning And Management, page 42-47. Nottingham, UK, (2004)