D. Wang, W. Chen, G. Wang, Y. Zhang, и B. Hu. Proceedings of the 19th ACM international conference on Information and knowledge management, стр. 1417--1420. New York, NY, USA, ACM, (2010)
J. Xu, C. Chen, G. Xu, H. Li, и E. Abib. WSDM '10: Proceedings of the third ACM international conference on Web search and data mining, стр. 171--180. New York, NY, USA, ACM, (2010)