@inproceedings{HT-2007-LeeH,
	author        = "Sung Eob Lee and Steve SangKi Han",
	booktitle     = "{Proceedings of the 18th Conference on Hypertext and Hypermedia}",
	doi           = "10.1145/1286240.1286250",
	isbn          = "978-1-59593-820-6",
	pages         = "35--36",
	publisher     = "{ACM}",
	title         = "{Qtag: introducing the qualitative tagging system}",
	year          = 2007,
}