Periodic solutions of discrete second order difference equations
English version (Springer): Ukrainian Mathematical Journal 24 (1972), no. 4, pp 432-435.
Citation Example: Mikhailovskaya N. A., Mitropolskiy Yu. A. Periodic solutions of discrete second order difference equations // Ukr. Mat. Zh. - 1972. - 24, № 4. - pp. 537—541.
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