@inproceedings{SIGIR-2002-EvansSS,
	author        = "David A. Evans and James G. Shanahan and Victor Sheftel",
	booktitle     = "{Proceedings of the 25th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/564376.564472",
	pages         = "417--418",
	publisher     = "{ACM}",
	title         = "{Topic structure modeling}",
	year          = 2002,
}