%0 Journal Article %A J. Brüning %A R. V. Nekrasov %A A. I. Shafarevich %T Quantization of Periodic Motions on Compact Surfaces of Constant Negative Curvature in a Magnetic Field %J Matematičeskie zametki %D 2007 %P 32-42 %V 81 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2007_81_1_a2/ %G ru %F MZM_2007_81_1_a2