1. Hongbing Li, BoMeng, ShifuChen.An agent based approach for constructing software systems of virtual simulation [J]. International Journal of Virtual Reality, 2005, 5(4).
2. Johnson W L, Richel, Stiles R.Integrating pedagogical agent VE [J]. Presence: Teleoperators and Virtual Environments, (2004).
3. Reignier P, Harrouet F.Morvan S, AreV:A Virtual Reality MultiPlatform[A], Heudin J-C(Ed):Virtual Worlds 98, LNAI 1434[C], (2005).
4. Fisher S S, Fraser G.Intelligent Virtual worlds continue To develop Computer Graphics, 2004, 33(2).