1. Brasche , G. Walke , B. 1997 Concepts, Services, and Protocols of the New GSM Phase 2 +General Packet Radio Service. IEEE Communications Magazine, August 1997 94 104
2. Zanini , P. 1997 Examining the GPRS radio interface and evaluating GPRS radio performance. GPRS & HSCSD conference. Centre for EuroTelecoms, London 22-24 October 1997
3. Penttinen , J. 1999 Tulevaisuuden GSM-datapalveluiden vaikutus radioverkkosuunnitteluun (The effects of future GSM data services on the radio network planning). Licentiate thesis, Helsinki University of Technology 123
4. Penttinen , J. 2000 Effects of GPRS on GSM Radio Network. ICT 2000, International Conference on Telecommunications, Acapulco, México 22-25 May, 2000 162 6