This article is cited in 3 papers

Ordinary Differential Equations

Periodic solutions of impulse differential systems in critical cases

A. A. Boichuk^a, N. A. Perestyuk^b, A. M. Samoilenko<sup>c

a</sup> National Taras Shevchenko University of Kyiv
^b Mathematics Institute, Academy of Sciences of the Ukrainian SSR
^c Institute of Geophysics Ukrainian Academy of Sciences

UDC: 517.926

Received: 25.07.1990

 English version: Differential Equations, 1991, 27:9, 1070–1073

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