Periodic solutions of quasilinear autonomous systems with time-lag
English version (Springer): Ukrainian Mathematical Journal 20 (1968), no. 2, pp 239-240.
Citation Example: Kozubovskaya I. G., Martynyuk D. I. Periodic solutions of quasilinear autonomous systems with time-lag // Ukr. Mat. Zh. - 1968. - 20, № 2. - pp. 263–265.
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