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Translated from Ukrainskii Matematicheskii Zhurnal, Vol.21, No. 1, pp. 73–85, January–February, 1969.
In conclusion, the author expresses his appreciation to Yu. A. Mitropol'skil and A. M. Samoilenko for their valuable comments and interest in the study.
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Tkach, B.P. Periodic solutions of a countable system of differential equations with deviating neutral argument. Ukr Math J 21, 58–67 (1969). https://doi.org/10.1007/BF01086682
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DOI: https://doi.org/10.1007/BF01086682