%0 Journal Article %A D. D. Bainov %T Substantiation of the method of averaging for a two point boundary value problem for ordinary differential equations, unsolved with respect to the derivative %J Matematic̀Œki vesnik %D 1970 %P 29 %V 22 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MV_1970_22_1_a5/ %F MV_1970_22_1_a5