3GPP TS 03.64 Overall Description of the GPRS Radio Interface; Stage 2 (R99).
3GPP TS 05.01 Physical Layer on the Radio Path; General Description (R99).
3GPP TS 05.02 Multiplexing and Multiple Access on the Radio Path (R99).
3GPP TS 05.03 Channel Coding (R99).
3GPP TS 05.04 Modulation (R99).
3GPP TS 05.08 Radio Subsystem Link Control (R99).
3GPP TS 05.10 Radio Subsystem Synchronization (R99).