The green function and conditions for the existence of invariant sets of impulse systems
English version (Springer): Ukrainian Mathematical Journal 41 (1989), no. 10, pp 1187-1190.
Citation Example: Tkachenko V. I. The green function and conditions for the existence of invariant sets of impulse systems // Ukr. Mat. Zh. - 1989. - 41, № 10. - pp. 1379–1383.
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