1. ASTM D257, Standard Test Methods for D-C Resistance or Conductance of Insulating Materials.
2. Basic Electromagnetic Fields, 2nd ed.; Harper and Row: New York, 1987.
3. Advanced Engineering Electromagnetics, Wiley: New York, 1989.
4. ASTM E104, Standard Practice for Monitoring Constant Relative Humidity by Means of Aqueous Solutions.