S. Liu, C. Yu, и W. Meng. Proceedings of the 14th ACM international conference on Information and knowledge management, стр. 525--532. New York, NY, USA, ACM, (2005)
D. Helic, C. Trattner, M. Strohmaier, и K. Andrews. Proceedings of the 2010 IEEE Second International Conference on Social Computing, стр. 161--168. Washington, DC, USA, IEEE Computer Society, (2010)
C. Trattner, C. Körner, и D. Helic. Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies, стр. 18:1--18:8. New York, NY, USA, ACM, (2011)