3GPP TS 23.271. 'Functional Stage 2 Description of LCS,' The 3rd Generation Partnership Project. 2002
3GPP TS 25.305, 'Functional Stage 2 Specification of DE positioning,' The 3rd Generation Partnership Project, 2002
3GPP TS 44.035, 'Location Services (LCS); Broadcast network assistance for Enhanced Observed Time Difference (E-OTD) and Global Positioning System (GPS) positioning methods ,' The 3rd Generation Partnership Project, 2002