@INPROCEEDINGS{Laorden2011a, author = {Carlos Laorden and Borja Sanz and Igor Santos and Patxi Gal\'an-Garc\'ia and Pablo G. Bringas}, title = {Collective Classification for Spam Filtering}, booktitle = {Proceedings of the 4$^{th}$ International Conference on Computational Intelligence in Security for Information Systems (CISIS)}, year = {2011}, pages = {1--8}, }