%0 Journal Article %A Veljko A. Vujičić %T On quasi-linear oscillation of the mechanical system %J Theoretical and applied mechanics %D 1978 %P 165 %V 4 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TAM_1978_4_1_a16/ %G en %F TAM_1978_4_1_a16