Y. Zhang, и M. Pennacchiotti. Proceedings of the 22nd international conference on World Wide Web, стр. 1521--1532. International World Wide Web Conferences Steering Committee, (2013)
J. Wang, Y. Zhang, C. Posse, и A. Bhasin. Proceedings of the 22nd international conference on World Wide Web, стр. 1377--1388. International World Wide Web Conferences Steering Committee, (2013)