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Translated from Matematicheskie Zametki, Vol. 42, No. 1, pp. 60–72, July, 1987.
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Babin, A.V. Smoothness of solutions of the Cauchy problem for degenerate parabolic equations. Mathematical Notes of the Academy of Sciences of the USSR 42, 544–551 (1987). https://doi.org/10.1007/BF01138724
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DOI: https://doi.org/10.1007/BF01138724