Gomes, L. H.; Almeida, R. B.; Bettencourt, L. M. A.; Almeida, V. & Almeida, J. M. (2005), 'Comparative Graph Theoretical Characterization of Networks of Spam and Legitimate Email' .

Kong, J. S.; Boykin, P. O.; Rezaei, B. A.; Sarshar, N. & Roychowdhury, V. P. (2005), Scalable and Reliable Collaborative Spam Filters: Harnessing the Global Social Email Networks., in 'CEAS' .


Golbeck, J. & Hendler, J. (2004), 'Reputation Network Analysis for Email Filtering' .

Gyöngyi, Z.; Garcia-Molina, H. & Pedersen, J. (2004), Combating Web Spam with TrustRank., in 'VLDB' , pp. 576-587 .