%0 Journal Article %A M. G. Yumagulov %A D. A. Yakshibaeva %T Operator method for the study of small oscillations in systems with aftereffect %J Vestnik Samarskogo universiteta. Estestvennonaučnaâ seriâ %D 2013 %P 37-42 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSGU_2013_9_a5/ %G ru %F VSGU_2013_9_a5