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2. V. V. Efimov, E. A. Kulikov, A. B. Rabinovich, and I. V. Fain, Ocean Boundary Waves (Gidrometeoizdat, Leningrad, 1985) [in Russian].
3. N. E. Kochin, I. A. Kibel’, and N. V. Roze, Theoretical Hydrodynamics (Fizmatgiz, Moscow, 1963; Interscience, New York, 1964), Part 1.
4. A. A. Kurkin and E. N. Pelinovsky, Freak Waves: Facts, Theory, and Modeling (NGTU, Nizhnii Novgorod, 2004) [in Russian].
5. L. D. Landau and E. M. Lifshits, Theory of Elasticity (Nauka, Moscow, 1965; Pergamon Press, Oxford, 1986).