C.  Bouras, Kapoulas, V., Spirakis, P., Moiras, D., Ouzounis, V., ??? Tatakis, A., ?????., ?On-Demand Hypermedia/Mutimedia Service using Pre-Orcestrated Scenarios over the Internet?, Networking and Information Systems Journal, Hermes Science Publishing, Volume 2, No. 5-6, ??  741 - 762, 1999.