%0 Journal Article %A V. A. Il'in %T Optimization of the boundary control by a~displacement or by an elastic force on one end of a~string under a~model nonlocal boundary condition %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2010 %P 124-136 %V 268 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2010_268_a9/ %G ru %F TM_2010_268_a9