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2. A. D. Galanin, Theory of Nuclear Reactors Using Thermal Neutrons [in Russian], Atomizdat, Moscow (1957), p. 151.
3. B. G. Dubovskii et al., Report No. 29 to the International Conference of Physical Problems Involved in Designing Thermal Neutron Reactors [in Russian], London (1967).
4. A. M. Weinberg, in: Theory of Nuclear Reactors [Russian translation], T. Birkhoff and E. Wigner (editors), Gosatomizdat, Moscow (1963), p. 22.
5. E. S. Wentzel, Theory of Probabilities [Russian translation], Nauka, Moscow (1964).