1. A resource for classic treatments of optical diffraction.;Goodman,1968
2. IEC 61828 2001. Ultrasonics: Focusing Transducers Definitions and Measurement Methods for the Transmitted Fields. International Electrotechnical Commission, Geneva, Switzerland. An international standard on focusing terms, principles and related measurements.
3. Acoustic Waves: Devices, Imaging, and Analog Signal Processing.;Kino,1987
4. Thorough treatment of diffraction, focusing, and apodization related to scattering.;Krautkramer,1975
5. Biomedical beam forming. An excellent review of diffraction and focusing, including limited diffraction beams.;Lu;Ultrasound in Med. & Biol.,1994