Jan 20, 2011 The University of Amsterdam at Trec 2010: Session, Entity, and Relevance Feedback Dec 10, 2010 Combining Concepts and Language Models for Information Access Jan 20, 2010 Topical Diversity and Relevance Feedback Nov 19, 2009 A query model based on normalized log-likelihood Feb 16, 2009 Concept models for domain-specific search Sep 16, 2008 The University of Amsterdam at the CLEF 2008 Domain Specific Track - Parsimonious Relevance and Concept Models Jul 16, 2008 Parsimonious Relevance Models Sep 13, 2007 Thesaurus-Based Feedback to Support Mixed Search and Browsing Environments