1. European Broadcasting Union: “ Digital Video Broadcasting (DVB): Interaction Channel for Satellite Distribution Systems”, ETSI EN 301 790 V1.3.1, 03 2003.
2. European Broadcasting Union: “Guidelines for the Use of EN 301 790”, ETSI TR 101 790 V1.2.1, 01 2003.
3. Internet Engineering Task Force, “Definition of the Differentiated Services Field in the IPv4 and IPv6 Headers”, RFC 2474, 12 1998.
4. Internet Engineering Task Force, “An Architecture for Differentiated Services”, RFC 2475, 12 1998.
5. ISO standard, ISO/IEC 13818-6: “Information Technology – Generic Coding of Moving Pictures and Associated Audio Information – Part 6: Extensions for DSM-CC”, 1998.