%0 Journal Article %A I. A. Shevchuk %T Addendum to direct approximation theorems of S.\,M.~Nikol'skij type on an interval, and inverse theorems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 230-232 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a142/ %G ru %F TM_1987_180_a142