1. Recent advances in the detection and sizing of cracks using ac fields;Dover;Br. J. non-destr. Test,1980
2. The use of a-c field measurements to determine the shape and size of a crack in a metal;Dover,1981
3. The measurements of surface cracks in metals by using ac electric fields;Michael,1982
4. The ac field around a plane semi-elliptical crack in a metal surface;Collins,1981
5. The use of ac field measurements for nondestructive testing;Collins,1985