1. The use of AC field measurements to determine the shape and size of a crack in a metal;Dover;ASTM STP,1981
2. Principles and Application of Electromagnetic Fields;Plonsey,1961
3. The AC field around a plane semi-elliptical crack in a metal surface;Collins,1981
4. The measurement of surface crack in metals by using AC electric fields;Michael,1982
5. The Boundary Element Method for Engineers;Brebbia,1984