%0 Journal Article %A A. M. Il'in %T On the behavior of the solution of a~boundary value problem when~$t\to\infty$ %J Sbornik. Mathematics %D 1972 %P 545-572 %V 16 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_16_4_a3/ %G en %F SM_1972_16_4_a3