1. Mouly, M., and Pautet, M.-B.: ‘The GSM system for mobile communications’, (Published by authors 1992)
2. ETSI EN 300 940, GSM 04.08 Version 7.1.2: ‘Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 specification’, 1998
3. EN 300 908, GSM 05.02 version 6.4.1: ‘Digital cellular telecommunications system (Phase 2+); Multiplexing and multiple access on the radio path’, 1997
4. General packet radio service in GSM