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2. B. W. Christ, J. J. Spijkerman, P. M. Giles, and F. C. Ruegg: NBS Internai Report, Washington, D.C., July 1965.
3. P. M. Gielen and R. Kaplow: Dep. Clearinghouse Report, AD-633-725,1966.
4. J. M. Genin and P. A. Flinn:Phys. Lett., 1966, vol. 22, pp. 392–93.
5. B. W. Christ and P. M. Giles: inMössbauer Effect Methodology, 1967, vol. 13, pp. 37–65.