1. Johnson, S. A., J, F. Greenleaf, M. Tanaka, B. Rajagopalan, and R. C. Bahn: Reflection and transmission techniques for high resolution quantitative synthesis of ultrasound parameter images. 1977 IEEE Ultrasonics Symposium Proceedings, IEEE Cat. #77CH1264-1SU.
2. Johnson, S. A., J. F. Greenleaf, F. A. Duck, A. Chu, W. F. Samayoa, and B. K. Gilberts: Digital computer simulation study of a real-time collection, post-processing synthetic focusing ultrasound cardiac camera. In: Acoustical Holography, Volume 6 ( Newell Booth, editor), Plenum Press, New York, 1975, pp 193–211.
3. Duck, F. A., S. A. Johnson, J. F. Greenleaf, and W. F. Samayoas Digital image focusing in the near field of a sampled acoustic aperture. Ultrasonics 15 (2): 83–88, 1977.
4. Johnson, S. A., J. F. Greenleaf, B. Rajagopalan, R. C. Bahn, B. Baxter, and D. Christensen: High spatial resolution ultrasonic measurement techniques for characterization of static and moving tissues. Proceedings of the 1977 Ultrasound Tissue Characterization Symposium (In Press).
5. Johnson, S. A., J. F. Greenleaf, M. Tanaka, B. Rajagopalan, and R. C. Bahn: Quantitative synthetic aperture reflection imaging with correction for refraction and attenuation: Application of seismic techniques in medicine. Proceedings of the 1978 San Diego Biomedical Symposium 17: 337–349, 1978.