A. Mathes. Computer Mediated Communication, LIS590CMC (Doctoral Seminar), Graduate School of Library and Information Science, University of Illinois Urbana-Champaign, December, (2004)
R. Fagin, R. Kumar, и D. Sivakumar. SODA '03: Proceedings of the fourteenth annual ACM-SIAM symposium on Discrete algorithms, стр. 28--36. Philadelphia, PA, USA, Society for Industrial and Applied Mathematics, (2003)