Cha, M., Kwak, H., Rodriguez, P., Ahn, Y.Y. and Moon, S.. "I tube, you tube, everybody tubes: analyzing the world's largest user generated content video system." (2007): 1--14.

Hayes, C. and Avesani, P.. "Using Blog Tags To Identify Topic Authorities." 2007. https://apps.lis.uiuc.edu/wiki/display/LEADS/Fall+2007+Archive.

Hayes, C., Avesani, P. and Veeramachaneni, S.. "An analysis of the use of tags in a blog recommender system." ITC-IRST Technical Report. http://sra. itc. it/people/hayes/pubs/06/hayes-ijcai07-tech-report. pdf (2006): .