@conference {gao2010clickthrough,
	title = {Clickthrough-based translation models for web search: from word models to phrase models},
	booktitle = {Proceedings of the 19th ACM international conference on Information and knowledge management},
	year = {2010},
	pages = {1139{\textendash}1148},
	publisher = {ACM},
	organization = {ACM},
	author = {Gao, Jianfeng and He, Xiaodong and Jian-Yun Nie}
}
