%0 Journal Article %A B. I. Efendiev %T Initial-value problem for a second-order ordinary differential equation with distributed-order differentiation operator %J Matematičeskie zametki SVFU %D 2022 %P 59-71 %V 29 %N 2 %U http://geodesic.mathdoc.fr/item/SVFU_2022_29_2_a4/ %G ru %F SVFU_2022_29_2_a4