TY JOUR TI Relativistic motion of particle in photogravitational field of star KW relativistic motion KW photogravitational field KW deforming ellipse KW spiral JO Actual directions of scientific researches of the XXI century: theory and practice AU Zubko, O.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov