1. See, for example, R. C. Richardson and E. Smith,Experimental Techniques in Low Temperature Physics(Addison-Wesley, New York, 1988), Chap. 5.
2. Giant dielectric constants at the approach to the insulator-metal transition
3. Intermediate-frequency conduction in Si:As below the metal-insulator transition
4. ac Impurity hopping conducting in p-InSb
5. See, for example,Applying Error Correction to Network Analyzer Measurements, Hewlett-Packard Application Note 1287-3 (Hewlett-Packard Co., Englewood, CO, 1999).