%0 Journal Article
%A A. K. Kerimov
%T Sufficient conditions for optimality in an extremal problem with a~free boundary
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1988
%P 87-105
%V 185
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1988_185_a7/
%G ru
%F TM_1988_185_a7