@article{Lioma2008143, title = {A syntactically-based query reformulation technique for information retrieval}, journal = {Information Processing & Management}, volume = {44}, number = {1}, pages = {143--162}, year = {2008}, note = {Evaluation of Interactive Information Retrieval Systems}, issn = {0306-4573}, doi = {http://dx.doi.org/10.1016/j.ipm.2006.12.005}, url = {http://www.sciencedirect.com/science/article/pii/S030645730600207X}, author = {Lioma, Christina and Ounis Iadh}, keywords = {Query reformulation}, keywords = {Pseudo-relevance feedback}, keywords = {Part of speech tagging}, keywords = {Part of speech blocks (POS blocks)} }