1. J. A. Ricx and R. E. Slovacek in: The Physics of Intermediate Spectrum Reactors, ed. by J. R. Stern, Chapter 23, Usaec (1958).
2. H. Hurwitz, J. B. Nims, Jr., and M. L. Storm: Multigroup Treatments of Gamma-Ray Absorption, Kapl-753 (1952)
3. also contained in "The Physics of Intermediate Spectrum Reactors", ed. by J. R. Stern, Chapter 22, Usaec (1958).
4. H. Goldstein: Fundamental Aspects of Reactor Shielding, Reading, Mass.: Addison-Wesley 1959, p. 167.
5. L. G. Alexander: The Integral Spectrum Method for Gamma Heating Calculations in Nuclear Reactors, Paper No. 57-NE SC-29, Second Nuclear Engineering and Science Conference, March 11–14, 19 57, Philadelphia, Pa.