C.  Bouras, Primpas, D., Karaliotas, A., Paraskevas, M., Oikonomakos, M., ??? Sintoris, C., ?????., ?QoS issues in the Research and Academic Networks: The case of GRnet?, in Industrial Conference on Multi-Provider QoS/SLA Internetworking (MPQSI 2005), Tahiti, French Polynesia, 2005.