%0 Journal Article %A A. R. Danilin %T Approximation of a~singularly perturbed elliptic problem of optimal control %J Sbornik. Mathematics %D 2000 %P 1421-1431 %V 191 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2000_191_10_a0/ %G en %F SM_2000_191_10_a0