1. D.W. Medcraft: Development of the UK Packet Switched Services, Proc. Conf. on Data networks ONLINE, 173, 1980.
2. A. Danet et al: The French Public Packet Switching Service, The TRANSPAC Network, Proc. 3rd Int. Conf. on Computer Communication, Toronto, 251–269, 1976.
3. L.G. Roberts: Telenet: Principles and Practice, Proc. of the European Computing Conference on Communication Networks, London, 325–329, 1975
4. J. Rinde: TYMNET: An Alternative to Packet Switching Technology, Proc. of the 3rd Int. Conf. on Computer Communication, Toronto, 268–273, 1976.
5. A.M. Rybczynski,: Datapac Service Characteristics, Proc. D.F. Weir of the 5th Data Comms. Symp. 4–50, Utah, 1977.