P. Chirita, S. Costache, W. Nejdl, and S. Handschuh. WWW '07: Proceedings of the 16th International Conference on World Wide Web, page 845--854. New York, NY, USA, ACM, (2007)
W. Voon, N. Mustapha, and M. Sulaiman. Proceedings of the 12th International Conference on Information Integration and Web-based Applications &\#38; Services, page 909--912. New York, NY, USA, ACM, (2010)
P. Chirita, S. Costache, W. Nejdl, and S. Handschuh. WWW '07: Proceedings of the 16th International Conference on World Wide Web, page 845--854. New York, NY, USA, ACM, (2007)