D. Cotting, R. Ziegler, M. Gross, and H. Fuchs. Proc. of Eurographics 2005, Eurographics Association, page pp. 705-714. (2005)http://graphics.ethz.ch/~dcotting/publications.html.
E. Mynatt, E. Huang, S. Voida, and B. MacIntyre. Public and Situated Displays - Social and Interactional Aspects of Shared Display Technologies, Kluwer, Dordrecht, (2003)