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This research was supported by the International Science Foundation under grants Nos. RK4000 and MLY000 and by the Russian Foundation for Basic Research under grants Nos. 93-011-16088 and 93-01-00273.
Landau Institute for Theoretical Physics. Bashkir State University Institute of Mathematics, Ufa Division of the RAN Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 30, No. 1, pp. 18–29, January–March, 1996.
Translated by M. V. Pavlov, R. A. Sharipov, and S. I. Svinolupov
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Pavlov, M.V., Sharipov, R.A. & Svinolupov, S.I. Invariant integrability criterion for equations of hydrodynamic type. Funct Anal Its Appl 30, 15–22 (1996). https://doi.org/10.1007/BF02509552
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DOI: https://doi.org/10.1007/BF02509552