1. B. R. Tittmann, E. R. Cohen and J. M. Richardson, “Scattering of longitudinal waves incident on a spherical cavity in a solid,”J. Acoust. Soc. Amer.63, 68 (1978).
2. B. R. Tittmann, H. Nadler and N. E. Paton, “A technique for studies of ductile fracture in metals containing voids or inclusions,”Metall. Trans.7A, 320 (1976).
3. L. A. Ahlberg and B. R. Tittmann, “Measurement techniques in elastic wave scattering experiments,”1980 Ultrasonics Symposium ProceedingsIEEE, New York (1980) 842.
4. J. D. Achenbach, A. K. Gautesen and H. McMaken, “Diffraction of elastic waves by cracks—analytical results,” in Elastic Waves and Non-destructive Testing of Materials AMD 29, The American Society of Mechanical Engineers, New York (1978) 33–52.
5. J. L. Opsal, “Matrix theory of elastic wave scattering,”Proc. DARPA/AFML Review of Progress in Quantitative NDE, Contract No. AFWL-TR-80-4078, p. 328 (1980). Also in University of California Preprint UCRL-84116, Lawrence Livermore Laboratory.