%0 Journal Article
%T On the number invariant line of planar polynomial differential systems from above estimate
%A Ushkho, A..
%A Tlyachev, V..
%A Ushkho, D..
%K polynomial differential systems, invariant straight line, singular point, isoclines, incident
%J Actual directions of scientific researches of the XXI century: theory and practice
%D 2014
%N 2
%P 3
%I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov