@conference {Gao_04:Dependence,
	title = {Dependence language model for information retrieval},
	booktitle = {27th ACM-SIGIR, Sheffield},
	year = {2004},
	month = {jul},
	pages = {170-177},
	author = {Jianfeng Gao and Jian-Yun Nie and Guangyuan Wu and Guihong Cao}
}
