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2. B. Carlson, Solution of the Transport Equation, Sn-Approximation, USAEC Document LA 1891 (1955).
3. D. L. Broder et al., Kernenergie,13, No. 12, 380 (1970).
4. L. P. Abagyan et al., Group Constants for Computation of Nuclear Reactors [in Russian], Atomizdat, Moscow (1964).
5. T. A. Germogenova et al., Transport of Fast Neutrons in Plane Screens [in Russian], Atomizdat, Moscow (1971).