- Ricardo A. Baeza-Yates, Paolo Boldi, Berthier A. Ribeiro-Neto, Berkant Barla Cambazoglu, editors, Proceedings of the Second International Conference on Web Search and Web Data Mining, WSDM 2009, Barcelona, Spain, February 9-11, 2009. ACM, 2009.
- Nick Craswell, Rosie Jones, Georges Dupret, Evelyne Viegas, editors, Proceedings of the 2009 workshop on Web Search Click Data, WSCD@WSDM 2009, Barcelona, Spain, February 9, 2009. ACM, 2009.