@inproceedings{Azzopardi2013,
	title = {How {Query} {Cost} {Affects} {Search} {Behavior} {Categories} and {Subject} {Descriptors}},
	isbn = {978-1-4503-2034-4},
	booktitle = {Proceedings {SIGIR} 2013},
	author = {Azzopardi, Leif and Kelly, Diane and Brennan, Kathy},
	year = {2013},
	keywords = {all or part of, economic models, in-, or hard copies of, permission to make digital, production theory, query cost, query interfaces, search behavior, teractive information retrieval, this work for},
	pages = {23--32},
}

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