T. Yoshinaka, S. Ishii, T. Fukuhara, H. Masuda, und H. Nakagawa. Proceedings of the 2008/2009 international conference on Social software: recent trends and developments in social software, Seite 88--99. Berlin, Heidelberg, Springer-Verlag, (2010)
Y. Lin, H. Sundaram, Y. Chi, J. Tatemura, und B. Tseng. Proceedings of the 3rd international workshop on Adversarial information retrieval on the web, Seite 1--8. New York, NY, USA, ACM, (2007)