@inproceedings{SIGIR-2007-NtoulasC,
	author        = "Alexandros Ntoulas and Junghoo Cho",
	booktitle     = "{Proceedings of the 30th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1277741.1277776",
	isbn          = "978-1-59593-597-7",
	pages         = "191--198",
	publisher     = "{ACM}",
	title         = "{Pruning policies for two-tiered inverted index with correctness guarantee}",
	year          = 2007,
}