S. Hupfer, L. Cheng, S. Ross, and J. Patterson. Proceedings of ACM 2004 conference on Computer Supported Cooperative
Work (CSCW �04), ACM Press, New York, (2004)
A. Sarma. UCI-ISR-05-3. Institute for Software Research, Donald Bren School of Information
and Computer Sciences, University of California, Irvine, (March 2005)