P. Heim, S. Lohmann, D. Tsendragchaa, and T. Ertl. Proceedings of the 7th International Conference on Semantic Systems (I-SEMANTICS 2011), page 175-178. New York, NY, USA, ACM, (2011)
D. Rusu, B. Fortuna, and D. Mladenic. 4th Linked Data on the Web Workshop (LDOW 2011), 20th World Wide Web Conference (WWW 2011)., Hyderabad, India, (2011)