%0 Journal Article %A A. N. Davidchik %A A. A. Ligun %T On the Jackson constants in the approximation of functions by linear operators %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1987 %P 8-15 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1987_1_a1/ %G ru %F IVM_1987_1_a1