%0 Journal Article %A D. I. Borisov %T On lacunas in the lower part of the spectrum of the periodic magnetic operator in a~strip %J Contemporary Mathematics. Fundamental Directions %D 2017 %P 373-391 %V 63 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2017_63_3_a0/ %G ru %F CMFD_2017_63_3_a0