Averaging with respect to a fast variable in triple-frequency systems of second approximation
English version (Springer): Ukrainian Mathematical Journal 37 (1985), no. 4, pp 346-351.
Citation Example: Golets B. I., Golets V. L., Petryshyn R. I. Averaging with respect to a fast variable in triple-frequency systems of second approximation // Ukr. Mat. Zh. - 1985. - 37, № 4. - pp. 437–443.
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