%0 Journal Article
%A S. A. Laptev
%T On~the behaviour for large values of the time of the solution of the Cauchy problem for the equation $\frac{\partial^2u}{\partial t^2}-\frac{\partial^2u}{\partial x^2}+\alpha(x)u=0$
%J Sbornik. Mathematics
%D 1975
%P 403-426
%V 26
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1975_26_3_a6/
%G en
%F SM_1975_26_3_a6