%0 Journal Article %A N. I. Brisch %A I. N. Valeshkevich %T The Fourier method for differential equations containing a second derivative with respect to the time %J Doklady Akademii Nauk %D 1962 %P 1247-1250 %V 146 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_146_6_a0/ %G ru %F DAN_1962_146_6_a0