M. Zhou, S. Bao, X. Wu, and Y. Yu. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 680--693. Berlin, Heidelberg, Springer Verlag, (2007)
A. Zubiaga, C. Körner, and M. Strohmaier. Proceedings of the 22Nd ACM Conference on Hypertext and Hypermedia, page 93--102. New York, NY, USA, ACM, (2011)