Read about bots in chapter 3 (author: Stefano De Paoli) of Springer’s Handbook on 3D3C platforms (Editor: Yesha Sivan).
The goal of this chapter is to develop a comparative framework for studying bots in Virtual Worlds.
Free download for most universities.
http://link.springer.com/chapter/10.1007/978-3-319-22041-3_2