1. J. F. Greenleaf, S. A. Johnson, S. L. Lee, G. T. Herman, and E. H. Wood, “Algebraic reconstruction of spatial distributions of acoustic absorption with tissues from their two-dimensional acoustic projections,” in Acoustical Holography, Vol.5, P. S. Green, Ed., New York: Plenum, 1974, pp. 591–603.
2. J. F. Greenleaf and Robert C. Bahn, “Clinical imaging with transmissive ultrasonic computerized tomography,” IEEE Trans. Biomed. Eng., Vol. BME-28, pp.177–185, 1981.
3. J. F. Greenleaf, “Computerized tomography with ultrasound,” Proc. IEEE, Vol. 71, pp. 330–337, 1983.
4. K. A. Dines and R. J. Lytle, “Computerized geophysical tomography,” Proc. IEEE, Vol. 67, pp. 1065–1073, 1979.
5. R.J. Lytle and K.A. Dines, “Iterative ray tracing between boreholes for underground image reconstruction,” IEEE Trans on Geoscience and Remote Sensing, Vol. Ge-18, pp. 234–240, 1980.