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3. E. Kamke, Differentialgleichungen Losungsmethoden und Losungen (Akademische Verlagsgesellschaft, Leipzig, 1957).
4. V. G. Levich, Physico-Chemical Hydrodynamics (Fizmatlit, Moscow, 1959) [in Russian].
5. L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 6: Fluid Mechanics (Nauka, Moscow, 1986; Pergamon, New York, 1987).