1. Non-destructive testing;Halmshaw,1991
2. Advances in non-destructive examinations for structural integrity;Nichols,1982
3. The capability and limitations of Non Destructive Testing;Hanstead,1988
4. Effective NDE for structural integrity;Nichols,1988
5. Gilardoni A, Orsini A, Taccani M. Non-destructive testing, Glardoni Spa. Pub.