Industrial communication networks - High availability automation networks - Part 7: Ring-based Redundancy Protocol (RRP) (IEC 62439-7:2011); English version EN 62439-7:2012— 82 стр.
Industrial communication networks - High availability automation networks - Part 7: Ring-based Redundancy Protocol (RRP) (IEC 62439-7:2011); English version EN 62439-7:2012, Corrigendum to DIN EN 62439-7:2012-08; (IEC-Cor.:2015 to IEC 62439-7:2011)— 8 стр.
