1. : Private communication.
2. , , et al: Improvements in ultrasonic CT data acquisition and preprocessing, in Frontiers in Engineering and Health Care. IEEE Catalog No 79 CH-14407, p 64–67.
3. : Ultrasonics symposium, Boston, January 1981.
4. , , et al: Reconstructive tomography based on ultrasonic attenuation, in , (eds): Computer-Aided Tomography and Ultrasonics in Medicine. New York, Elsevier/North-Holland, pp 151–164.
5. Average velocity of ultrasound in the human female breast