Ushkho D. S. RussiaМайкоп Adyghe State University, 385000, Russia, Maykop, Pervomayskaya st. 208 доцент кафедры математического анализаКандидат физико-математических наукDamirubych@mail.ru Author's articles An Estimate from Above of the Number of Invariant Straight Lines of n-th Degree Polynomial Vector Field Symmetry Axes of Planar Polynomial Differential Systems
