%0 Journal Article %A A. V. Chernov %T On differentiation of functionals of approximating problems in the frame of solution of free time optimal control problems by the sliding nodes method %J Vestnik rossijskih universitetov. Matematika %D 2018 %P 861-876 %V 23 %N 124 %I mathdoc %U http://geodesic.mathdoc.fr/item/VTAMU_2018_23_124_a28/ %G ru %F VTAMU_2018_23_124_a28