S. Braun, C. Schora, and V. Zacharias. 5th International Conference on Semantic Systems (I-SEMANTICS 2009), Proceedings of I-KNOW 09 and I-SEMANTICS 09
, page 445-454. Graz, Austria, Verlag der Technischen Universitt Graz, (2009)
V. Zacharias, S. Braun, and A. Schmidt. Handbook of Research on Web 2.0, 3.0 and X.0: Technologies, Business, and Social Applications
, IGI Global, (2009)