ETR 083 : universal personal telecommunication (UPT); general UPT security architecture / European Telecommunications Standards Institute
ETR 093 : satellite earth stations (SES): possible european standardisation of certain aspects of satellite personal communications networks (S-PCN): phase 1 report / European Telecommunications Standards Institute
ETR 102 : european digital cellular telecommunications system (phase 2): technical performance objectives (GSM 03.05) / European Telecommunication Standards Institute
ETR 103 : european digital cellular telecommunications system (phase 2): radio network planning aspects (GSM 03.30) / European Telecommunication Standards Institute