1. Alonso, G., Fiedler, U., Hagen, C., Lazcano, A., Schuldt, H., Weiler, N., WISE: Business to Business E-Commerce, Proceedings of the 9th International Workshop on Research Issues on Data Engineering, Sydney, Australia, pp. 132–139, 1999.
2. Buhler, P., Vidal, J. M., Enacting BPEL4WS Specified Workflows with Multiagent Systems, Proceedings Workshop on Web Services and Agent-Based Engineering, New York City, USA, 2004.
3. Burton, B., Drakos, N., Smith, D. M., Austin, T., Cain, M. W., Understand the Opportunities of the Emerging Integrated Collaboration Market, Gartner Research, ID Number: G00126560, April, 2005.
4. Consortium, E. N. S. R., Observatory of European SMEs – Part 8: Highlights from the 2003 Observatory, European Network for SME Research (ENSR), European Communities, 2004.
5. FIPA – Foundation for Intelligent Physical Agents, http://www.fipa.org , 2007.