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Yaroslavl'. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 27, No. 6, pp. 116–127, November–December, 1986.
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Kashchenko, S.A. Asymptotics of periodic solutions of autonomous parabolic equations with small diffusion. Sib Math J 27, 880–889 (1986). https://doi.org/10.1007/BF00970006
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DOI: https://doi.org/10.1007/BF00970006