%0 Journal Article %A M. I. Rabinovich %A A. A. Rosenblum %T A basis for asymptotic methods in the theory of the oscillations of nonlinear distributed systems %J Doklady Akademii Nauk %D 1971 %P 575-578 %V 199 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1971_199_3_a18/ %G ru %F DAN_1971_199_3_a18