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4. V. A. Shaposhnik, V. I. Vasil’eva, and O. V. Grigorchuk, Transport Phenomena in Ion Exchange Membranes (MFTI, Moscow, 2001) [in Russian].
5. V. A. Bykov, I. A. Krylov, M. N. Manakov, et al., Microbiological Production of Biologically Active Substances and Preparations (Vysshaya Shkola, Moscow, 1987) [in Russian].