%0 Journal Article
%A Yu. E. Karpeshina
%T Perturbation theory formulas for the Schr\"odinger equation with a~nonsmooth periodic potential
%J Sbornik. Mathematics
%D 1992
%P 101-123
%V 71
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1992_71_1_a7/
%G en
%F SM_1992_71_1_a7