Almeida, Leandro, Hilton José Silva de Azevedo, Gustavo Alberto Gimenez Lugo, and Cesar Augusto Tacla.
" Approach for Analyzing Interactions in Collaborative E-learning Systems Using Folksonomies." <em>Proceedings of the 3rd Workshop-School on Agents, Environments, and Applications,
Caxias do Sul/RS, 2009</em>. SBC, 2009,  
pp.69-78.