1. Russell JD (2007) SAMPE J 43:26
2. Russell JD (2007) AMMATIC 1:1
3. Stanley RK (1995) Special nondestructive testing methods, 2nd edn. Am. Soc. Nondestruct. Test., Columbus
4. Schmidt JT, Skeie K (1989) Magnetic particle testing, 2nd edn. Am. Soc. Nondestruct. Test., Columbus
5. Allgaier MW, Ness S (1993) Visual and optical testing, 2nd edn. Am. Soc. Nondestruct. Test., Columbus