33GPP TS 04.11: "Digital cellular telecommunications system (Phase 2+); Point to Point (PP) Short Message Service (SMS); support on mobile radio interface"
43GPP TS 07,07: "AT command set for GSM Mobile Equipment (ME)" .
53GPP TS 23,040: "Technical realization of the Short Message Service (SMS)" ,
6ETSI TS 100 585: "Digital cellular telecommunications system (Phase 2+); Use of Data Terminal Equipment - Data Circuit terminating; Equipment (DTE - DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)"
