Cluster-based query expansion.

@inproceedings{kalmanovich-2009-clusterbased, author = {Inna Gelfer Kalmanovich and Oren Kurland}, editor = {ChengXiang Zhai and James Allan and Javed A. Aslam and Mark Sanderson and Javed A. Aslam and ChengXiang Zhai and Justin Zobel}, title = {{Cluster-based query expansion}}, booktitle = {{Proceedings of the 32nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2009, Boston, MA, USA, July 19-23, 2009}}, pages = {646--647}, publisher = {ACM}, year = {2009}, url = {https://doi.org/10.1145/1571941.1572058}, doi = {https://doi.org/10.1145/1571941.1572058} }