1. Angela Dalmonte, Mauro Gaspari, 1995. Modelling interaction in agent system, technical report UBLCS-95-7, laboratory for computer science, University of Bologna.
2. Mauro Gapari, Enrico Motta, 1994. Symbol-level Pequirment for agent-level rrogramming, technical report UBLCS-94-2, Laboratory for Computer Science, University of Bologna.
3. Michael, R. Genesereth, Steven, P. Ketchpel, 1994. Software Agents.Communication of ACM,37: 48–54.
4. Newell, A. 1982. The knowledge level.Artificial Intelligence,18: 87–127.
5. Shoham, Y., 1993. Agent-oriented programming.Artificial Intelligence,60: 51–92.