@inproceedings{SIGIR-2003-NanasUR,
	author        = "Nikolaos Nanas and Victoria S. Uren and Anne N. De Roeck",
	booktitle     = "{Proceedings of the 26th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/860435.860473",
	isbn          = "1-58113-646-3",
	pages         = "198--204",
	publisher     = "{ACM}",
	title         = "{Building and applying a concept hierarchy representation of a user profile}",
	year          = 2003,
}