ETSI TS 100 508-1999 Digitales Mobilfunk-Telekommunikationssystem (Phase 2+); International Mobile Station Equipment Identities (IMEI) GSM 02.16 Version 7.0.0 Release 1998
2000ETSI TS 100 508-2000 Digitales Mobilfunk-Telekommunikationssystem (Phase 2+); International Mobile Station Equipment Identities (IMEI)
1999ETSI TS 100 508-1999 Digitales Mobilfunk-Telekommunikationssystem (Phase 2+); International Mobile Station Equipment Identities (IMEI) GSM 02.16 Version 7.0.0 Release 1998