@inproceedings {4080,
	title = {Frequent Itemset Mining for Query Expansion in Microblog Adhoc Search},
	booktitle = {Text Retrieval Conference (TREC)},
	year = {2012},
	url = {http://trec.nist.gov/pubs/trec21/papers/waterloo.microblog.nb.pdf},
	author = {Younos Aboulnaga and Charles Clarke}
}
