TY JOUR TI Difference approximation of the optimal control problem for a parabolic equation with the quality criteria in border areas KW optimal control KW parabolic equation KW a difference approximation JO Actual directions of scientific researches of the XXI century: theory and practice AU Kasumov, R.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov