Evaluating tagging behavior in social bookmarking systems: metrics and design heuristics.
In: GROUP '07: Proceedings of the 2007 international ACM conference on Conference on supporting group work, pages 351-360. ACM, New York, NY, USA, 2007.
Umer Farooq, Thomas G. Kannampallil, Yang Song, Craig H. Ganoe, John M. Carroll and Lee Giles.
[doi]  [BibTeX] 
Social Bookmarking for Scholarly Digital Libraries.
IEEE Internet Computing, 11(6):29-35, 2007.
Umer Farooq, Yang Song, John M. Carroll and C. Lee Giles.
[doi]  [abstract]  [BibTeX]