1. Lecture Notes in Computer Science;N. Dulay,2002
2. Lecture Notes in Computer Science;S. Duflos,2002
3. Alcantara, O.D., Sloman, M.: QoS Policy Specification - A mapping from Ponder to the IETF,
http://citeseer.ist.psu.edu/482783.html
4. Celenti, E., Rajan, R., Dutta, S.: Service Level Specification for Inter-domain QoS Negotiation. draft-somefolks-sls-00.txt, Internet draft (November 2000)
5. Durham, D., Boyle, J., Cohen, R., Herzog, S., Rajan, R., Sastry, A.: The COPS Protocol, IETF RFC: 2748 (January 2000)