1. Edgar Ostrowski et al. 2nd Version of Requirements to the Transport Infrastructure RACE Project 2060, Internal Report, 30. June 1992
2. R. Braudes, S. Zabele Requirements for Multicast Protocols RFC 1458, May 1993
3. D. Ferrari Client Requirements for Real-Time Communication Services RFC 1193, November 1990
4. Laurent Mathy, Guy Leduc, Olivier Bonaventura, André Danthine A Group Communication Framework University of Liège, December 1993
5. Amit Gupta, Mark Moran Channel Groups A Unifying Abstraction for Specifying Inter-stream Relationships Tenet Group, University of California, and International Computer Science Institute