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Additional information
Novosibirsk. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 31, No. 4, pp. 166–179, July–August, 1990.
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Shmarev, S.I. Instantaneous appearance of singularities of a solution of a degenerate parabolic equation. Sib Math J 31, 671–682 (1990). https://doi.org/10.1007/BF00970640
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DOI: https://doi.org/10.1007/BF00970640