@conference {huang2009smoothing,
	title = {Smoothing document language model with local word graph},
	booktitle = {Proceedings of the 18th ACM conference on Information and knowledge management},
	year = {2009},
	pages = {1943{\textendash}1946},
	publisher = {ACM},
	organization = {ACM},
	author = {Huang, Yunping and Sun, Le and Jian-Yun Nie}
}
