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Institute of Mathematics, The Urals Division of the Russian Academy of Sciences, Ufa. Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 27, No. 2, pp. 50–62, April–June, 1993.
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Novokshenov, V.Y. Whitham deformations of top-like integrable dynamical systems. Funct Anal Its Appl 27, 118–127 (1993). https://doi.org/10.1007/BF01085982
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DOI: https://doi.org/10.1007/BF01085982