Publications in Math-Net.Ru
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The center-focus problem and reflecting function
PFMT, 2020, no. 2(43), 80–84
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Tíå linear systems perturbations, which do not change Poincaré mapping
PFMT, 2017, no. 1(30), 54–58
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On periodic solutions of differential equation with linear-fractional right-hand part
PFMT, 2015, no. 3(24), 63–65
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Time symmetry preserving perturbations of differential systems
Differ. Uravn., 40:10 (2004), 1325–1332
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