1. P. M. MORSE AND H. FESHBACH “Methods of Theoretical Physics,” Chapter 7.5. McGraw-Hill, New York, 1953.
2. B. DAVISON, “Neutron Transport Theory,” Oxford Univ. Press, London and New York, 1957.
3. J. LEWINS, Ph.D. Thesis, Dept, of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, Mass. 1959.
4. The General Critical Reactor Equations