1. The ANSA Reference Manual, Architecture Projects Management Ltd, Poseiden House, Castle Park, Cambridge CB3 PRD, UK, 1989.
2. Michael Benedikt, Cyberspace: Some Proposals,in Cyberspace: First Steps, Michael Benedikt (ed), MIT Press, 1991, pp 273–302.
3. Steve Benford, Adrian Bullock, Neil Cook, Paul Harvey, Rob Ingram and Ok Ki Lee, From Rooms to Cyberspace: Models of Interaction in Large Virtual Computer Spaces, The University of Nottingham, Nottingham, UK (to appear in the Butterworth-Heinmann journal, Interacting With Computers in 1993).
4. Steve Benford, Wolfgang Prinz, John Mariani, Tom Rodden, Leandro Navarro, Elsa Bignoli, Charles Grant Brown and Torbjørn Naslund, MOCCA — A Distributed Environment For Collaboration,Available from the MOCCA Working Group of Co-Tech.
5. A. Borning and M. Travers, Two Approaches to Casual Interaction over Computer and Video Networks, In Proc. CHI’91, New Orleans, April 27-May 2, 1991, pp13–19.