1. F.C. Billingsley, SPIE Proceedings, 1967 Computized Imaging Technique Seminar, II-1 (1967).
2. J.W. Cooey and J.W. Tukey, Math. Compt., 19, 297 (1965).
3. A.W. Lohmann and D.P. Paris, Appl. Opt., 6, 1739 (1967).
4. T. Suzuki, Y. Ichioka and M. Koyama, J. Appl. Phys. Jap. 4, Supple. I, 128 (1965).
5. L.B. Lesen et al., Proceedings, 1967 Fall Joint Computer Conference, p.41 (1967).