References
[Lashkari et al., 1994]
Lashkari, Yezdi; Metral, Max, and Maes, Pattie. Collaborative interface agents; 1994. <URL:ftp://media-lab.media.mit.edu/pub/agents/interface-agents/coll-agents.ps.Z>.
Cyberspace geography visualization - 15 October 1995
Luc Girardin, The Graduate Institute of International Studies