1. P. Holler, R. Becker, and R. S. Sharpe, “The Application of Eddy Currents in Weld Testing, ” Welding in the World, 22 (1984).
2. H.L. Libby, Introduction to Electromagnetic Nondestructive Test Methods (Robert E. Kreiger, Huntington, NY, 1971 ).
3. F.G. Stremler, Introduction to Communication Systems (Addison-Wesley, Reading, MA, 1982 ).