TY JOUR TI On fractional differential variational inequalities KW differential variational inequality KW derivative of a fractional order JO Actual directions of scientific researches of the XXI century: theory and practice AU Nguyen, V.. AU Tran , D.. AU Obukhovskiy, V.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov