%0 Journal Article %A M. I. Sumin %T Dual regularization and Pontryagin's maximum principle in a~problem of optimal boundary control for a~parabolic equation with nondifferentiable functionals %J Trudy Instituta matematiki i mehaniki %D 2011 %P 229-244 %V 17 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_2011_17_1_a18/ %G ru %F TIMM_2011_17_1_a18