%0 Journal Article %A B. R. Vaǐnberg %T On the local energy of solutions of exterior mixed problems that are periodic with respect to~$t$ %J Trudy Moskovskogo matematičeskogo obŝestva %D 1992 %P 213-242 %V 54 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1992_54_a6/ %G ru %F MMO_1992_54_a6