P. Venetis, G. Koutrika, and H. Garcia-Molina. Proceedings of the fourth ACM international conference on Web search and data mining, page 835--844. New York, NY, USA, ACM, (2011)
D. Ramage, P. Heymann, C. Manning, and H. Garcia-Molina. WSDM '09: Proceedings of the Second ACM International Conference on Web Search and Data Mining, page 54--63. New York, NY, USA, ACM, (2009)
P. Heymann, A. Paepcke, and H. Garcia-Molina. Third ACM International Conference on Web Search and Data Mining (WSDM2010), page 1--10. Stanford University, (February 2010)