%0 Journal Article
%A R. F. Bikbaev
%A S. B. Kuksin
%T A~periodic boundary value problem for the sine-Gordon equation, its small Hamiltonian perturbations, and KAM-deformations of finite-gap tori
%J Algebra i analiz
%D 1992
%P 42-78
%V 4
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_1992_4_3_a1/
%G ru
%F AA_1992_4_3_a1