@inproceedings{SIGIR-2008-CaoNGR,
	author        = "Guihong Cao and Jian-Yun Nie and Jianfeng Gao and Stephen Robertson",
	booktitle     = "{Proceedings of the 31st International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1390334.1390377",
	isbn          = "978-1-60558-164-4",
	pages         = "243--250",
	publisher     = "{ACM}",
	title         = "{Selecting good expansion terms for pseudo-relevance feedback}",
	year          = 2008,
}