1. For more information on elastic waves, see Kino (1987), now available on a CD-ROM archive from the IEEE Ultrasonics, Ferroelectrics, and Frequency Control Group and Auld (1990).
2. Acoustic Waves and Fields in Solids.;Auld;Chap. 8. Krieger Publishing, Malabar, FL.,1990
3. Fundamentals of Physical Acoustics.;Blackstock,2000
4. Physical Properties of Tissue: A Comprehensive Reference Book.;Duck,1990
5. Acoustic Waves: Devices, Imaging, and Analog Signal Processing.;Kino,1987