1. EN 4179, 2009. Aerospace series. Qualification and approval of personnel for non-destructive testing.
2. AIA-NAS-410, Aerospace Industries Association, National Aerospace Standard, NAS Certification and Qualification of Nondestructive Test Personnel.
3. ASNT Handbook, vols. 1–10. American Society for NDT, Columbus, OH.
4. Off axis fatigue of graphite/epoxy composite;Awerb uch,1981
5. Electrical and magnetic methods of nondestructive testing;Blitz,1991