1. NATO AST Series F-44;Chen,1988
2. Determination of the geometry of hidden defects by ultrasonic pulse analysis testing;Gericke;J. Acoustic Soc. Am.,1963
3. Ultrasonic spectroscopy of steel;Gericke;Materials Research and Standards,1965
4. C.H. Chen and W.L. Hsu, “Modern spectral analysis for ultrasonic NDT, in Proc. of Conf. on NDT of High-Performance Ceramics, Boston, MA, August 1987.
5. Signal processing in nondestructive evaluation of materials;Chen,1988