Diffraction of elastic waves by a rigid circular disc

[1]  DIFFRACTION OF SCALAR ELASTIC WAVES BY A FINITE CRACK. , 1964, Proceedings of the National Academy of Sciences of the United States of America.

[2]  L. Knopoff,et al.  DIFFRACTION OF VECTOR ELASTIC WAVES BY A CLAMPED FINITE STRIP. , 1964, Proceedings of the National Academy of Sciences of the United States of America.