DIN EN 61788-4:2008 Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors (IEC 61788-4:2007); German version EN 61788-4:2007
2017DIN EN 61788-4:2017 Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors (IEC 61788-4:2016); German version EN 61788-4:2016
2012DIN EN 61788-4:2012 Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors (IEC 61788-4:2011); German version EN 61788-4:2011
2008DIN EN 61788-4:2008 Superconductivity - Part 4: Residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors (IEC 61788-4:2007); German version EN 61788-4:2007