D. Milne, and I. Witten. Proceeding of AAAI Workshop on Wikipedia and Artificial Intelligence: an Evolving Synergy, page 25--30. AAAI Press, (July 2008)
F. Suchanek, M. Vojnovic, and D. Gunawardena. Proceeding of the 17th ACM conference on Information and knowledge management, page 223--232. New York, NY, USA, ACM, (2008)