%0 Journal Article %A A. K. Kerimov %T Sufficient conditions for optimality in an extremal problem with a~free boundary %J Informatics and Automation %D 1988 %P 87-105 %V 185 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1988_185_a7/ %G ru %F TRSPY_1988_185_a7