2016NF C31-888-4*NF EN 61788-4:2016 Superconductivity - Part 4 : residual resistance ratio measurement - Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
2012NF C31-888-4:2012 Superconductivity - Part 4 : residual resistance ratio measurement - Residual resistance ratio of Nb-Ti composite superconductors.