1. Building Product Models: Computer Environments Supporting Design and Construction;Eastman,1999
2. Communication roles that support collaboration during the design process;Sonnenwald,1996
3. B.J. Novitski, AEC Systems 2001, Architecture Week, http://www.architectureweek.com/2001/0627/tools_1-2.html.
4. City of Bits: Space, Place, and the Infobahn;Mitchell,1995
5. Community in the mind. A model for personal and collaborative design;Tzonis,2000