1. P. M. MORSE and H. FESHBACH, Methods of Theoretical Physics, p. 125, McGraw-Hill Book Company, New York (1953).
2. H. SOODAK and E. C. CAMPBELL, Elementary Pile Theory, p. 43, John Wiley & Sons, New York (1950).
3. Reactor Handbook Physics, pp. 444 and 614, J. F. HOGERTON and R. C. GROSS, Eds. McGraw-Hill Book Company, New York (1955).
4. A. M. WEINBERG and L. C. NODERER, “Theory of Neutron Chain Reactions,” CF-52-5-98, Vol. I, Chap. V, Oak Ridge National Laboratory (1951).
5. R. MURRAY, “Critical Dimensions of Untamped Conical Vessels,” AECD-3874 (Aug. 15, 1947); see also AECD-3874-Rev. Carbide and Carbon Chemicals Corp., Y-12 Plant, Oak Ridge, Tennessee (Sep. 10, 1984).