Invariant toroidal manifolds and resonances in discrete dynamical systems
English version (Springer): Ukrainian Mathematical Journal 27 (1975), no. 2, pp 132-143.
Citation Example: Gurtovnik A. S., Kogan V. P., Neymark Yu. I. Invariant toroidal manifolds and resonances in discrete dynamical systems // Ukr. Mat. Zh. - 1975. - 27, № 2. - pp. 167–182.
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