F. Zhang, N. Yuan, D. Lian, X. Xie, and W. Ma. Proceedings of the 22Nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 353--362. New York, NY, USA, ACM, (2016)
Y. Zheng, L. Zhang, X. Xie, and W. Ma. Proceedings of the 18th International Conference on World Wide Web, page 791--800. New York, NY, USA, ACM, (2009)
Y. Zheng, Q. Li, Y. Chen, X. Xie, and W. Ma. Proceedings of the 10th International Conference on Ubiquitous Computing, page 312--321. New York, NY, USA, ACM, (2008)
A. Alexandrov, W. Ma, A. Abbadi, and B. Manjunath. Storage and Retrieval for Image and Video Databases (SPIE), volume 2420 of SPIE Proceedings, page 12-23. SPIE, (1995)