%0 Journal Article %A M. M. Skriganov %T Structure of the spectrum of a~two-dimensional Schr\"odinger operator with periodic potential and some arithmetic properties of two-dimensional lattices %J Informatics and Automation %D 1981 %P 163-174 %V 158 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1981_158_a13/ %G ru %F TRSPY_1981_158_a13