On averaging in integrodifferential equations with a lag depending on the solution
English version (Springer): Ukrainian Mathematical Journal 25 (1973), no. 5, pp 580-584.
Citation Example: Fedorenko L. G. On averaging in integrodifferential equations with a lag depending on the solution // Ukr. Mat. Zh. - 1973. - 25, № 5. - pp. 696—701.
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