1. Query difficulty, robustness, and selective application of query expansion;Amati,2004
2. Query hardness estimation using jensen-shannon divergence among multiple scoring functions;Aslam,2007
3. Multimodal word distributions;Athiwaratkun,2017
4. Extended gloss overlaps as a measure of semantic relatedness;Banerjee,2003
5. Pattern Recognition and Machine Learning (Information Science and Statistics);Bishop,2006