1. User 4xxxxx9: Anonymizing query logs;Adar,2007
2. Improving web search ranking by incorporating user behavior information;Agichtein,2006
3. Access to query logs an academic researchers point of view;Bar-Ilan,2007
4. A face is exposed for aol searcher no. 4417749;Barbaro,2006
5. Utility preserving query log anonymization via semantic microaggregation;Batet;Information Sciences,2013