Electricity metering data exchange - The DLMS/COSEM suite - Part 6-1: Object Identification System (OBIS) (IEC 62056-6-1:2015); English version EN 62056-6-1:2016— 48 стр.
Communication systems for meters and remote reading of meters - Part 4: Wireless meter readout (Radio meter reading for operation in SRD bands); German version EN 13757-4:2013— 74 стр.