%0 Journal Article %A M. I. Rabinovich %T An asymptotic method in the theory of nonlinear oscillations of distributed systems %J Doklady Akademii Nauk %D 1970 %P 1253-1256 %V 191 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_191_6_a15/ %G ru %F DAN_1970_191_6_a15