1. NDT Resource Center, Depth of Penetration & Current Density, ‘http://www.ndt-ed.org/EducationResources/CommunityCollege/EddyCurrents/Physics/depthcurrentdensity.htm’.
2. Eddy-current standard depth of penetration;Hagemaier;Materials Evaluation,1985
3. The quantitative relation between true and standard depth of penetration of air-cored probe coils in eddy current testing;Molttl;NDT International,1990
4. Structural analysis of CFRP using eddy current methods;Lange;NDT & E International,1994
5. Non-destructive characterisation of carbon-fibre-reinforced plastics by means of eddy-currents;Mook;Composites Science and Technology,2001