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Additional information
Moscow State University. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 46, No. 1, pp. 125–131, January, 1981.
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Osipov, M.A., Shumovskii, A.S. Violation of the principle of minimality of the free energy in the self-consistent field approximation for some models of ferroelectrics. Theor Math Phys 46, 83–87 (1981). https://doi.org/10.1007/BF01019453
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DOI: https://doi.org/10.1007/BF01019453