@conference {liu_adaptive_2012,
	title = {Adaptive query suggestion for difficult queries},
	booktitle = {Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval},
	year = {2012},
	pages = {15{\textendash}24},
	publisher = {ACM},
	organization = {ACM},
	url = {http://dl.acm.org/citation.cfm?id=2348289},
	author = {Liu, Yang and Song, Ruihua and Chen, Yu and Jian-Yun Nie and Wen, Ji-Rong}
}
