%0 Journal Article
%A S. P. Novikov
%T Two-dimensional Schr\"odinger operators in periodic fields
%J Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya
%D 1983
%P 3-32
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/INTD_1983_23_a0/
%G ru
%F INTD_1983_23_a0