1. Dautenhahn, K.: Story-Telling in Virtual Environments, ECAI’98 Workshop on Intelligent Virtual Environments, Brighton, UK (1998).
2. Aylett, R.: Narrative in Virtual Environments: Towards Emergent Narrative. Papers from the AAAI Fall Symp. on Narrative Intelligence, Tech. Rep. FS-99-01, AAAI Press (1999).
3. Sgouros, N.M., Papakonstantinou, G. and Tsanakas, P.: A Framework for Plot Control in Interactive Story Systems, Proceedings AAAI’96, Portland, AAAI Press (1996).
4. Young, R.M.: Creating Interactive Narrative Structures: The Potential for AI Approaches. AAAI Spring Symp. on Artificial Intelligence and Computer Games, AAAI Press (2000).
5. Technical Report CMU-CS-97-156;M. Mateas,1997