%0 Journal Article %A T. M. Karaseva %T On an ``exact estimate'' of the multipliers of second order differential equations with periodical coefficients %J Doklady Akademii Nauk %D 1958 %P 34-36 %V 121 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_121_1_a7/ %G ru %F DAN_1958_121_1_a7