1. Nichols, R.W., “Advances in Non-Destructive Examinations for Structural Integrity,” Applied Science Publishers (1972).
2. Rolfe, S. and Barson, J., “Fracture and Fatigue Control in Structures: Applications of Fracture Mechanics,” Prentice-Hall (1977).
3. Dimarogonas, A.D. and Chondros, T.G., “Identification of Cracks in Welded Joints of Complex Structures,” J. Sound and Vib.,69 (4), (1980).
4. Ju, F.D., Wong, E.T. and Paez, T.L., “Modal Method in Diagnosis of Fracture Damage in Simple Structures,” Productive Applications of Mechanical Vibrations, ASME Publications (1982).
5. Freund, L.B. and Hermann, G., “Dynamic Fracture of a Beam in Plane Bending,” Trans. ASME, J. Appl. Mech. (1986).