@conference {cole2009usefulness,
	title = {Usefulness as the criterion for evaluation of interactive information retrieval},
	booktitle = {Proceedings of the third workshop on human-computer interaction and information retrieval Cambridge},
	year = {2009},
	pages = {1{\textendash}4},
	publisher = {HCIR},
	organization = {HCIR},
	author = {Cole, Michael and Jingjing Liu and Belkin, Nicholas J. and Bierig, Ralf and Gwizdka, Jacek and Chang Liu and Jin Zhang and Zhang, Xiangmin}
}
