%0 Journal Article %A A. M. Savchuk %T The Calderon--Zygmund operator and its relation to asymptotic estimates for ordinary differential operators %J Contemporary Mathematics. Fundamental Directions %D 2017 %P 689-702 %V 63 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2017_63_4_a8/ %G ru %F CMFD_2017_63_4_a8