%0 Journal Article %A I. P. Popov %T Vibration systems consisting only of inert or only elastic elements and the appearance of free harmonic vibrations in them %J Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika %D 2013 %P 95-103 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VTGU_2013_1_a10/ %G ru %F VTGU_2013_1_a10