Certain problems of existence of invariant toroidal sets of systems of difference equations
English version (Springer): Ukrainian Mathematical Journal 40 (1988), no. 2, pp 209-211.
Citation Example: Pan'kov V. G. Certain problems of existence of invariant toroidal sets of systems of difference equations // Ukr. Mat. Zh. - 1988. - 40, № 2. - pp. 241-244.
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