1. A. M. Rozen, Theory of Isotope Separation in Columns (Atomizdat, Moscow, 1960) [in Russian].
2. M. Benedict, T. Pigford, and H. W. Levi, Nuclear Chemical Engineering (McGraw-Hill, New York, 1981; Atomizdat, Moscow, 1960).
3. Isotopes: Properties, Production, Application, Ed. by V. Yu. Baranov (IzdAT, Moscow, 2000) [in Russian].
4. P. G. Kuznetsov, V. A. Sokolov, and I. P. Sedin, in Separation and Analysis of Hydrocarbon Gases (Akad. Nauk SSSR, Moscow, 1963), p. 114 [in Russian].
5. L. A. Nisel’son and V. N. Vigdorovich, in Proceedings of the All-Union Workshop on Methods of High Purity Substances Production (NIITEKhIM, Moscow, 1967), p. 48 [in Russian].