W. Song, G. Zhang, Y. Zou, Q. Yang, and X. Ma. Proceedings of the 2012 IEEE Asia-Pacific Services Computing Conference), page 225--232. Washington, DC, USA, IEEE Computer Society, (2012)
Q. Zhao, S. Bhowmick, X. Zheng, and K. Yi. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 309--318. New York, NY, USA, ACM, (2008)
Q. Zhao, S. Bhowmick, X. Zheng, and K. Yi. CIKM '08: Proceeding of the 17th ACM conference on Information and knowledge management, page 309--318. New York, NY, USA, ACM, (2008)