References
OPNET Technology Inc., Washington DC, OPNET documentation, v8.0.
R. J. Bates, GPRS: General Packet Radio Service. New York, NY: McGraw-Hill, 2001.
3rd Generation Partnership Project, GSM 03.60 v6.8.0, General Packet Radio Service (GPRS), Service description.
H. Granbohm and J. Wiklund, “GPRS-general packet radio service,” Ericsson Review, no. 2, 1999, pp. 82-88.