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2. N. S. Bakhvalov and G. P. Panasenko, Averaging of Processes in Periodic Media. Nauka, Moscow, 1984 (in Russian).
3. B. N. Chetverushkin and N. G. Churbanova, Conservative kinetic schemes for gas dynamics problems. Preprint No. 78. Moscow, Keldysh Institute of Applied Mathematics, USSR Akad. Sci., 1986 (in Russian).