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3. Casti, J., Detchmendy, D., Kagiwada, H., andKalaba, R.,Estimating the Parameters of an Inhomogeneous Medium by Probing with Rays, The RAND Corporation, Report No. RM-5915-PR, 1969.
4. Bellman, R., Kagiwada, H., andKalaba, R.,Dynamic Programming and an Inverse Problem in Transport Theory, Computing, Vol. 2, No. 1, 1967.