%0 Journal Article %A V. G. Doronin %A A. A. Ligun %T On a refinement of Jackson-type inequalities in the approximation of differentiable periodic functions by linear operators %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1995 %P 79-82 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1995_2_a9/ %G ru %F IVM_1995_2_a9