%0 Journal Article %A V. S. Kononenko %A P. Kh. Khabibullaev %T On a new effect of reduction of spectral density in a ultrasonic %J Doklady Akademii Nauk %D 1992 %P 673-676 %V 323 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_323_4_a13/ %G ru %F DAN_1992_323_4_a13