1. N. N. Bogolyubov, ?Kinetic equations in quantum mechanics,? in: Selected Works, Vol. 2, Naukova Dumka, Kiev (1979).
2. I. P. Bazarov and P. N. Nikolaev, ?Method of statistical operators in the theory of crystals,? Teor. Mat. Fiz.,41, 424 (1979).
3. I. P. Bazarov, É. V. Gevorkyan, and V. V. Kotenok, Statistical Theory of Polymorphic Transformations [in Russian], Izd. MGU, Moscow (1978).