C. Drumm, J. Lemcke, and D. Oberle. The Semantic Web: Real-World Applications from Industry, volume 6 of Semantic Web and Beyond, Springer, New York, (2008)
D. Porta, D. Sonntag, and R. Neßelrath. Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services. MobileHCI-09, September 15 - August 18, Bonn, Germany, ACM, (2009)