1. IETF RFC;M Allman,1999
2. IETF RFC;M Allman,2000
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4. Börjesson, J., Johansson, J., and Darin, F., (1999). GLONASS: experiences from the first global campaign. In Radio Vetenskap och Kommunikation 1999 (RVK ’99), Karlskrona, Sweden.
5. Wireless World;AC Clarke,1945