%0 Journal Article %A N. S. Imanbaev %A M. A. Sadybekov %T On spectral properties of a~periodic problem with an integral perturbation of the boundary condition %J Eurasian mathematical journal %D 2013 %P 53-62 %V 4 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2013_4_3_a4/ %G en %F EMJ_2013_4_3_a4