%0 Journal Article %A E. M. Ganapol'skii %T Electromagnetic $K$-system with prolonged keeping of microwave signal energy %J Doklady Akademii Nauk %D 1991 %P 1128-1131 %V 319 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1991_319_5_a22/ %G ru %F DAN_1991_319_5_a22